At the 4077th Mobile Army Surgical Hospital (M.A.S.H) unit in Korea, two army doctors by the names of Hawkeye Pierce and Trapper John McIntyre receive some exciting news in the mail. Their Korean house boy, Ho-John got accepted into Hawkeye's old college. Hawkeye and Trapper decide to hold a party filled with music, dancing, and alcohol to raise money for Ho-John's plane trip to the U.S. They achieve this by raffling off a weekend pass with a nurse, Lieutenant Dish for R&R in Tokyo.
After black marketers hijack the 4077th's supply of hydrocortisone, Hawkeye and Trapper concoct a deal with a local black marketer, Charlie Lee, to get some more. The catch: Henry's antique oak desk, which they must trade in order to get some of it. Margaret and Frank become suspicious about their plotting, and about the Koreans who come to check out the desk, which is whisked away by chopper as Henry and Frank watches in disbelief.
Trapper and Hawkeye seek to keep a new nurse from being transferred by Hot Lips, and they vie for her affection. Henry Blake, challenged by another commander to a boxing tournament, makes Trapper fight a big, intimidating soldier in exchange for keeping the nurse at the 4077th. Hawkeye and Ugly John employ the use of a glove soaked with ether to insure Trapper's victory, which impresses the nurse. Margaret and Frank's attempts to unfix the match collapses, as they are flattened by the unconscious boxer!
Frank Burns complains about Hawkeye Pierce's disrespect...and Henry appoints Hawkeye chief surgeon, to Burns's shock. The rest of the 4077th "coronates" Hawk while Frank and Hot Lips complain to General Barker. The General's visit provides him with a view of life at the 4077th M*A*S*H unit: camp hijinks, a poker game, and a surgery session. This shows him M*A*S*H has fun but gets the job done.
The 4077th is designated as the setting for the making of an army film on Mobile Army Surgical Hospital units. Hawkeye is chosen as the star while Margaret and Frank compose a screenplay. The Eye Of The Hawk objects to the piece of propaganda that filmmaker Lt. Bricker is producing and, having exposed the original film, reshoots a new one his way, starring himself as Groucho Marx-ish Yankee Doodle Doctor, and poking fun at glorifying doctors while concluding with a rather serious speech about the hell of war.
John Hodges, a chopper pilot referred to as The Cowboy because of his gun holster belt and cowboy hat, has been hit in the shoulder, and arrives at the 4077th. He is expecting a letter--he's worried his wife Jean at home is leaving him for another man ("She's probably off with some rodeo rider; she's a sucker for a 10-gallon hat!"). He wants to go home, but Henry refuses, stating Cowboy's wound isn't serious enough to merit a stateside ticket. Bad luck then follows Henry Blake like the seat of his pants: he gets shot at while golfing, his tent gets flattened by a driverless jeep, and the latrine explodes while he's inside. The Cowboy offers to fly Henry to Seoul and then threatens to shove him out! The letter finally arives for Cowboy, assuring he is loved. Hawkeye and Trapper uses the radio to convince The Cowboy to spare Henry's life and come down, at which they succeed.
Henry receives a citation for the camp achieving the best efficiency rating, and then General Hammond reassigns him to Tokyo. Frank then changes the camp to be more military, and he confiscates Hawkeye's and Trapper's still. They use forged passes to go to Tokyo to convince Henry to come back and end up pretending Radar is sick.
A rash of thefts breaks out in the camp. Missing pieces include Frank's silver picture frame, Margaret's hair brush, and Trapper's watch. The camp is searched and everything is found in Hawkeye's locker. Everyone thinks he did it. Hawkeye manages to announce to the camp that the items will be dusted for prints to identify the real thief, and catches Ho-Jon. He needed money to bring his family from the North, and to bribe border guards.
Hawkeye moves a wounded North Korean soldier into The Swamp, rather than let him be shipped out before he's stable. During the night he and Trapper play Dracula, and siphon off a pint of Frank's blood. The soldier then contracts hepatitis, so they have to test Frank without him knowing, and have to keep him away from Margaret and the patients.
Hawkeye writes home, describing Christmas in Korea: Radar ships a jeep home, a piece at a time; Henry gives the monthly lecture on sex, with the aid of figure A and figure B; Trapper helps deliver a calf; Klinger and Frank get into a fight, but Father Mulcahy smoothes things over; Hawkeye and Trapper sabotage Margaret's tent; Hawkeye flies to the front line dressed as Santa, to help a wounded soldier.
Radar gets a Dear John recording from home. Hawkeye and Trapper try to set him up with a date, but fail. Radar is taken by a new nurse at the camp and she is into poetry and music, so they coach him. Margaret wants to stop the relationship, so Hawkeye and Trapper get between her and Frank until she relents. Radar's "Ahhhh, Bach!" and "That's highly significant," quotes win him the girl.
Hawkeye creates a fake doctor, Captain Jonathan S. Tuttle, to give supplies to the local orphans. Henry wants Tuttle to be officer of the day, so Hawkeye creates a fake personnel file, and all his back pay is given to the orphanage. When General Clayton wants to reward his generosity, Hawkeye is forced to invent a story about Tuttle jumping from a chopper without his parachute! Of course, Trapper's new friend, Captain Murdoch, obtained the fake dog tags and parachute...!
Frank throws his back out whilst spending the evening with Margaret, and ends up in traction. He promptly applies for the Purple Heart, having been 'technically' wounded at a frontline unit. Tommy Gillis, an old friend of Hawkeye's, is writing a book about the war, and pays him a visit. Later, Tommy is brought into the camp, seriously wounded, and Hawkeye can't save him. A 15-year-old kid is in the hospital to have his appendix out. He joined up to be a hero back home, but Hawkeye has him sent home, giving him Frank's purple heart.
Once again, Hawkeye writes home to his father, telling him of the latest gossip: the camp gets a new surgeon, who turns out to be a fake; Hawkeye bets he can walk into the mess tent naked for lunch, and no one will notice; Radar cheats on his final exam from the High School diploma company; Margaret rejects Franks advances and he gets drunk late into the night; the camp have a no talent night.
The camp suffers from the severe cold, except for Hawkeye who has received some long john's from his father. They get passed around from person to person, as a gift, a gambling stake, a trade, a bribe, stolen, given up to Father Mulcahy, who gives them to Henry, who returns them to Hawkeye as thanks for taking out his appendix.
The camp tunes into the Army/Navy football game, only to be shelled and have an unexploded bomb land in the middle of the compound. They ring around trying to identify the bomb, and the camp prepares for the worst. Hawkeye and Trapper are left the task of following instructions to disarm the bomb, which turns out to be full of propaganda leaflets from the CIA.
Hawkeye and Frank argue over Frank's surgical ability. Hawkeye performs a difficult operation and the patient does not recover, as he should. Hawkeye begins to doubt his ability and moves out of The Swamp. He decides to open up his patients again, and discovers a nick in the colon that even Frank admits anyone could have missed.
As usual Frank's normal drone of verbal abuse upsets Ginger, so Hawkeye puts his arm in a cast while he is asleep. Frank puts in for a transfer, and after a broadcast goes out of Frank telling Margaret he's leaving, she decides to leave as well. As a result, Col. Blake puts both Hawk and Trap on double post-op duty until he finds replacements for Majs. Burns and Houlihan. Unwilling to lose their two favorite patsies, <em>and</em> to be worn to a frazzle from doing 2 shifts in O/R, Hawkeye and Trapper hatch a scheme to prevent Frank and Hot Lips from leaving. That night, Hawkeye and Trapper pretend they have found gold, letting Frank overhear them. Frank then withdraws his request when he thinks he's found gold himself, although the joke is on him when he finds, amongst other things, a gilded jeep!
General Clayton calls so say that a ceasefire is to be declared. The camp celebrates, Klinger gives away his dresses and locals start to take pieces of the camp. But Trapper does not believe it. Hawkeye claims he is married to avoid promises he made to several nurses. The party to celebrate the cease-fire, which never really took place, is interrupted by incoming wounds.
Captain Kaplan is to be shipped home, but becomes paranoid that something will happen to him before he leaves. He takes the wheel of the jeep to drive to Kimpo himself, but crashes and ends up in plaster. Henry's wife is in labor and gives birth while he has Radar calling the hospital every 5 mins.An entertainer, Jackie Flash, visits the camp to entertain the troops.
Brought on by Frank and Margaret's negative reports, General Clayton assigns a psychiatrist, Captain Hildebrand, to examine the 4077th M*A*S*H unit, to see if it should be disbanded. Henry tells them to be on their best behavior, or else they will be split up. But the 4077th soon begins to act in their traditional, insane ways: the shrink experiences Max Klinger, watches the hijinks of Hawkeye and Trapper John, and witnesses the trysts of Frank and Hot Lips. While Hildebrand confronts the unit on its behaviour, choppers bearing wounded begin to arrive and everyone heads for the OR. The onslaught of casualties shows the 4077th's true side.
An inept North Korean pilot, known as "5 O'Clock Charlie", makes his daily attempt to bomb the ammo dump. Frank puts in a request for an anti-aircraft gun, which is granted when Charlie hits General Clayton's jeep. Frank takes charge of the gun, while Hawkeye and Trapper are determined to prevent him using it, by getting rid of the ammo dump. Frank misses Charlie and destroys the dump.
Radar writes the weekly activity report. Hawkeye operates on a wounded prisoner who grabs a scalpel and attacks the doctors. Frank wants Klinger thrown out on a section 8,so Henry calls in a psychiatrist, Major Freedman. Hawkeye is attracted to a new nurse but thinks she is married. Trapper loses a patient who developed complications during the O.R. fracas with the wounded soldier.
Hawkeye and Trapper want the army to admit responsibility for the accidental bombing of a local village. They fill out a report and Major Stoner arrives to investigate, and leaves with all the evidence. When the story is released it claims that the enemy bombed the village, and the army tries to gag the doctors. But, thinking there could be a medal in it for him, Frank has also put a report together, with copies of all the evidence, including shell fragments, so the army comes clean.
Hawkeye has been in non-stop surgery for 3 straight days without sleep, and the wounded keep coming. He decides to find out who started the war, and sends a telegram to Harry S Truman. After listening to some of Frank's rubbish about the North Koreans wanting better plumbing, he tries to send the officers' latrine to the North Koreans with an offer of peace. Trapper finally manages to sedate him. Trapper (about Hawkeye): "I guess he's just unstable. You see, he took this weird oath as a young man, never to just stand by and watch people die."
Hawkeye operates on a 5-year old Korean boy, and Radar can't find his family. Henry plans to send him to the orphanage, and the camp enjoys his company while they can. Trapper decides to adopt him after consulting his wife, and has to rescue him after he wanders into the minefield. Kim's mother turns up at the orphanage looking for him.
Corporal Walker is being sent home, and he wants to marry his Korean girl so she and their baby can return with him. CID sends Lt Willis to investigate, but when he refuses Hawkeye and Trapper frame him. Hawkeye is upset that a nurse he was pursuing does not approve of the marriage between "a gook" and "one of us".
Once more Hawkeye writes home to his father: the doctors operate on a soldier with a grenade shot into his body; Hawkeye and Trapper colour the skin of a racist patient, who demanded the right colour blood, while he is asleep; Henry gets a movie of his daughters birthday from home; the officers hold the monthly staff meeting.
The camp succumbs to the Asian flu, except for Hawkeye and Margaret, who have to do everything themselves. As the others start to recover, Hawkeye falls ill but he still manages to operate when wounded arrive. Finally the others are well enough for Hawkeye to stop working and rest. He is thanked for his service with a commemorative roll of toilet paper.
Hawkeye and Trapper recover from an all night party. Henry gets a barbecue, and Hawkeye puts in a request for an incubator. The Quartermaster turns him down. They locate a Major with 3 incubators, but he won't let them have one. A Colonel tries to sell them one, and then they get into trouble with a General at a press conference. Finally, Radar trades the barbecue for an incubator.
Sidney Freedman comes to the camp, and joins in the poker game at The Swamp. Radar hits a local with a jeep, although the local is famous for jumping in front of vehicles for the compensation. Hawkeye and Trapper operate on an intelligence officer against regulations. Sidney helps talk around a soldier who wants to kill Frank.
Klinger pretends to be pregnant. Hawkeye and Trapper operate on General Mitchell's son, and the General gives them 3 days in Tokyo Henry keeps getting calls from Tokyo about what Hawkeye and Trapper are doing. When they get back to the 4077 Frank asked the general for an officers club for the camp. They plot to allow the enlisted men access to the club, and when the General opens it the rules are bent to give his son access, which Hawkeye exploits to give access to all.
Henry returns from a week in Tokyo, to announce that he is in love with a 20-year old girl called Nancy Sue Parker. She arrives for the weekend, and Henry shows her off. Nancy comes on to Hawkeye while Henry is in surgery. Henry is reminded of his wife back home when Radar places a call for him, and he realises it's his wife he loves.
A riotous episode in which Hawkeye will do anything to get a new pair of boots: In order to get Zale to get him some, he must get an appointment for Zale with Futterman, the camp dentist, who will only do it if Henry will give him a pass to Tokyo, and Henry will only grant the pass if Houlihan will get off his back, which she will do only if the guys throw a party for Frank's birthday, with a cake, and Radar will only help get the cake if he gets a date with Nurse Murphy, who will only date someone with a hair dryer, and Klinger won't give up the hair dryer unless he gets a section 8 (and Frank won't sign). Inevitably, the deal falls through, much to the Hawkeye's chagrin.
Private Baker, who is always going AWOL, is desperate for plastic surgery on his nose. Hawkeye gets an old friend, and plastic surgeon, to visit the camp, promising him a nurse called "The Barracuda". They put together an elaborate scheme to perform the operation without Frank or Margaret finding out.
While there are no casualties, Hawkeye & Trapper crate up Frank while he sleeps and receive gorilla suits through the mail. Henry gets a tan and gives another sex orientation lecture. When the wounded start pouring in again, their own side shells the camp, hitting the generator, and Radar tries to get through to someone to stop the shelling.
The supply lines to the camp are cut. Radar, the housing officer, starts doubling people up to save fuel and Klinger is thrown out of the nurse's tent. People start burning everything to stay warm while Frank wears his heated socks. The toilet paper supply is worst hit, and then wounded start arriving. Supplies are eventually restored.
A classic episode in which Colonel Flagg and another secret agent from another intelligence agency come to the 4077th to keep their eyes on one another and the camp. Hawkeye and Trapper trick them both into thinking that Burns is a traitor - one thinks he's a fascist, the other thinks he's a communist. Vinny Pratt, a friend of Trapper's turns up.
As Hawkeye and Trapper are planning to leave for Tokyo, an unusual offer to swap POW patients between the Chinese and the 4077th comes in. Henry, after much debate, agrees to send Hawkeye, Trapper, Frank, Radar, and Klinger into enemy territory. Frank almost botches the swap when he brings a squirt gun to the exchange. Fortunately, the Chinese Dr. Lin Tam has a sense of humor; he went to the University of Illinois, after all.
Sick and tired of having liver and fish for an 11-day stretch, Hawkeye, driven near to insanity, starts a riot in the mess tent. He and Trapper then orders spare ribs and sauce from the best place he ever had them, in Chicago. Trapper calls a woman he spent a weekend with to pick up the ribs, and then they get choppered in. Unfortunately, right as they're sitting down to eat, wounded arrive, and Hawkeye is forced to postpone sinking his teeth into his beloved ribs.
A Greek Colonel thanks the 4077th by giving them food and drink for an Easter celebration. Bu the feast is foiled when softhearted Radar saves the main course from the spit - a lamb, which Radar tricks Henry into giving a medical discharge and sends home to Ottumwa, Iowa. Thus, Hawkeye and Trapper invent the famed Spam Lamb! Meanwhile, a soldier who had shot himself to get out of the army confesses to Frank, thinking he is Father Mulcahy.
Hawkeye hits Major Burns and Houlihan is a witness. Despite Hawkeye and Trapper's claims that it wasn't intentional, Frank makes allegations against Hawkeye, and he is put in house arrest facing court martial. A female colonel is sent to inspect the nurses. When she cries "Rape!" when Burns visits her tent, Houlihan recants her story, and Burns, not Hawkeye, ends up under house arrest.
Frank buys two sets of Pearl's, one for Margaret and one for his wife. After some talk, Radar gets Hawkeye $3,000 in lost earnings, Hawkeye gives it to Mulcahy for the orphans, but then the army wants the money back. Trapper wins big at poker after using Hawkeye's watch as a stake, so Hawkeye takes his winnings to avoid a stay in the honeymoon suite of The Stockade Hilton.
Actually, we won't. One of the classic M*A*S*H episodes. Henry finally gets his discharge. While he is tying things up, Burns prepares for his new command. Henry bids a tearful adieu, but not before Klinger turns up in an outrageous tropical outfit, and gets Henry to zip him up, and he gets a kiss Margaret. He gives Radar a hug and his last order, and departs by helicopter. In the traumatic and shocking last scene, a devastated Radar announces that Henry has been killed when his plane was shot down over the Sea of Japan.
Radar is driving Hawk, B.J., Sherman, and Frank in a bus back from a "medical conference" when they get lost. They stop to see if they can find anything they recognize. When they decide to turn around, they find that the bus does not want to start. Radar goes off in the middle of the night for the latrine, and does not immediately return. Stricken, Hawkeye wants to set out to find him, only to be stopped by Sherman. An injured Korean surrenders to get medical help from Hawk and B.J.. Upon Radar return, the Korean helps repair the bus and get them out of danger.
Frank has Hawkeye up on charges of mutiny, for usurping his authority when Potter was away on leave, and Frank was the C.O. The Judge Advocate, Colonel Carmichael, tries the case; BJ, Potter, and Radar are in attendance of the preliminary hearing to offer support for Hawkeye. There are several versions of what happened: according to Frank, he was trying to hold the 4077th together during heavy casualties when everyone else was falling apart; according to The Eye Of The Hawk, BJ and Radar, it was Frank who was out of control with his regimen. Finding no evidence of the alleged mutiny, the judge drops all charges against Hawkeye and puts Frank in his place (but will he stay there?!).
Clete Roberts introduces this segment as his show; he's arrived at Korea to interview the staff of the 4077th Mobile Army Surgical Hospital because of its high 97% efficiency rating. In Roberts' interviews with Hawkeye, BJ, Frank, Radar, Klinger, Mulcahy and Potter, they talk about how they cope with their situation, what they miss about home, how they feel about who they work with, and whether they see any good in coming from war.
A rumour that there's going to be a practive bug-out causes anxiety. When Potter assembles the unit in an attempt to squelch the rumor, the call comes in to bug out, and the rumour suddenly comes to life! Meanwhile, Hawkeye begins surgery on a patient with a spinal injury. The bug-out proceeds without him, Hot Lips and Radar, and they quickly learn after the unit departs that they're in the midst of the front. When Potter, Mulcahy, BJ, Frank and the others arrive at the buildings which had been scouted by helicopter, they find the house full of "business girls," and Potter gives them Klinger's dresses to persuade them to leave the house. A helicopter comes to evacuate the spinal injury patient, and just as the three get ready to go to the new location, they find the 4077 is already returning, and eventually everyone reunites back at the camp, what with the Chinese being repulsed.
While fixing a stove that explodes, Hawkeye's face is badly burned. His eyes are bandaged, and it is not known if he will ever see again. Meanwhile Frank bets on the outcome of a baseball game, which he has already heard on the radio. After much tension in the camp the bandages come off, and happily, Hawkeye can see again.
When Hot Lips confines Nurse Baker to her quarters, little does she know that Baker's husband has arrived in the camp. Hawkeye and B.J. put them together in Hot Lips' tent, telling everyone that a quarantined patient has been placed there. When Hot Lips discovers what has happened, she breaks down and refuses to press charges.
After Frank discovers that Danny Fitzsimmons has shot himself to get out of combat, Father Mulcahy is called in. Realizing his lack of understanding of the fighting, Mulcahy accompanies Radar to an aid station, where they encounter the real war at first hand. Mulcahy performs an emergency tracheotomy, guided by Hawkeye over the radio.
After 24 hours of surgery, Hawkeye and Potter venture off to a Korean hospital to lend a hand. Hawkeye is appalled to learn that he must carry a gun. After helping the Koreans, they are shelled on the way back. They scramble from the jeep before it is shelled, and Potter urges Hawkeye to shoot in self-defense, against Hawkeye's will, and he does...into the air.
While Colonel Potter goes to Tokyo on R&R, his horse develops colic. Klinger becomes chronically depressed, and Hot Lips gets appendicitis. The horse is flushed out with a hose, Hawkeye and B.J. perform an appendectomy on Hot Lips, and all are well when Potter returns, except Klinger. Potter offers Klinger a discharge for severe depression, and Klinger gets very excited, which loses him the discharge.
After Potter orders Radar to move a Korean spirit post believed to ward off evil spirits, things mysteriously begin to go wrong. When an old Korean man is brought into camp for medical attention, he refuses surgery unless the spirits in the camp are exorcised. A priestess is brought in, who exhibits her dance and her bells and chants. All is well, and Radar returns the spirit post to its original position.
After Hawkeye bemoans the young age of the wounded, he appears to develop problems. Sleepwalking and bad dreams, according to Sidney Freedman, are taking Hawkeye back to a simple time, but the horrors of war continue to intrude. After Sidney's assurances that he is as sane as can be, Hawkeye's life once again seems to settle down.
Radar gets accepted into the "Famous Las Vegas Writers School", and begins to write his impressions of the camp. It happens to be Frank's birthday, so Hawkeye and B.J. stage a fight with each other to make Frank happy. Radar: "Dear Mum, I gave up the writing course on account I found out I can write better as myself than as Hemingway, O'Neill, or any of those other bums. Simplistically yours, Walter."
Befuddled by a crossword puzzle, Hawkeye persuades his old friend Tippy Brooks, a whiz at puzzles, brought to camp. Tippy arrives with his commanding officer Admiral Prescot, thinking it's a medical emergency. Having scrubbed up and helped out with the wounded they provided the needed solution to the puzzle.
Lieutenant Colonel Harold Beckett lies wounded in post-op waiting to get back to the front for five more days of combat duty to get his promotion. Meanwhile, Cho Lin, the Ping Pong champ, is engaged to Soony. He leaves to get her a ring, when the South Korean army conscripts him. He arrives at the 4077th as a wounded soldier, and after being patched up he is married at the camp.
As a cure for the increased tension at the 4077th, Potter obtains a copy of his favorite film, "My Darling Clementine", and makes a social event out of it. As the film continues to break, tensions rise, until Mulcahy plays the piano, Radar does his impersonations, and everyone acts out scenes from the film.
Prompted by pressure from Frank, Hot Lips sets a date for marriage with Lieutenant Colonel Donald Penobscott. When Donald arrives in camp for the wedding, a bridal shower and bachelor party are given. When he has passed out drunk, Hawkeye and B.J. place Donald in a body cast and convince him that he has broken his leg. The ceremony is performed and Donald and Hot Lips leave for a week's honeymoon in Tokyo.
After Maj. Margaret Houlihan-Penobscott leaves for her honeymoon, Maj. Frank Burns becomes very distraught, so Potter sends him on R&R. As they deal with the physical and psychological wounds in a heavy load of casualties, members of the 4077th wonder why Maj. Burns is late in returning from R&R and why Margaret returned from her honeymoon in a deep funk. Soon they learn that Maj. Burns has been arrested for antics with a general and his wife in Seoul; later, Hawkeye and BJ will discover that Margaret has already encountered marital troubles. Radar gets a temporary replacement for Maj. Burns: a Major Charles Emerson Winchester III. Maj. Winchester arrives at the 4077th, only to painfully discover that he's the permanent replacement after Frank Burns is thoroughly examined, uncannily acquitted, undeservingly promoted (to Lt. Colonel!!!), and quickly transferred to a VA hospital in Indiana.
Radar wants to become a man so Hawkeye recommends he goes to Seoul. On his way there he is hit by a mine. Hawkeye performs surgery on him. After surgery, Hawkeye goes to the Officers Club where he gets hammered. The next day he goes to surgery severely hung over. Radar tells Hawkeye he is disappointed in him. Hawkeye explodes and is then yelled at by Major Houlihan, Colonel Potter and Father Mulcahy. Radar and Hawkeye make up. Radar receives a Purple Heart.
Hawkeye tries unsuccessfully to get to Seoul, to see Nurse Gilmore for the weekend. Meanwhile, Winchester has taped a letter home, asking for his influential parents to help get him back to the States. To get even, Hawkeye and B.J. switch Winchester's clothes, causing Winchester to alter his eating patterns.
With supplies low, the 4077th gets a truckload of ice cream churns and salt tablets. But what it needs are light bulbs, and in the dimly lit post-op Charles makes an error for which he draws the ultimate wrath of his two surgeon bunkmates. Meanwhile, B.J. receives a mystery novel that everyone in camp reads in turn. The last page is missing and the solution to the mystery is undiscovered until B.J. calls the author by long distance.
Radar notices a number of tattoos on one of the wounded, and convinces himself that with a tattoo he will be irresistible to women. Everyone tries to discourage him, and he admits to having received a tattoo that will wash off. Meanwhile, Margaret is frustrated with a new nurse who keeps getting upset at the sight of combat injuries.
Colonel Victor Bloodworth predicts that 280 wounded will arrive at the 4077th. Hawkeye is antagonized by Bloodworth and shoves him against a wall. Bloodworth presses for a court martial until he becomes one of the wounded and watches Hawkeye saving a soldier's life. Realizing Hawkeye's value as a doctor, Bloodworth drops all charges.
The 4077th has just ended a rough 3-day ordeal with wounded soldiers. Charles plays (?) a French horn and drives Hawkeye and B.J. crazy. They refuse to bathe until the French horn playing is stopped; the two are even forced to eat outside because of their unhygenic presences. Meanwhile Potter attempts to saves the life of a patient, Saunders, whose unfortunate accident has rendered him suicidal. Time and time again, Potter pleads against Saunders' taking the easy way out; Saunders holds out until a little dose of reverse psychology finally discourages him. When a "battle of the bands" eventually erupts between Winchester, Hunnicutt and Pierce, the camp collectively intervenes and hoses down Hawkeye and B.O. while Margaret has a soldier run over Charles' French horn with a jeep. Later, Sang Nu presents Charles with a new horn...one which doesn't have a mouthpiece!
After a delay of three weeks, five sacks of mail arrive, and everyone in camp reacts to good and bad news from home. Hawkeye receives love letters addressed to another Benjamin Pierce, another man has approached B.J.'s wife, and Radar's mom has found a boyfriend. Klinger: "I may not have a family in Toledo, but I got one here."
With a temporary transfer of personnel between the 4077th and the 8063rd, Captain Roy Dupree replaces Hawkeye, whilst Lorraine Anderson makes eyes at Charles. Fearing this to be permanent, Charles and B.J. successfully conspire to have Dupree permanently removed from the 4077th. Charles (to Hawkeye): "God, I missed you!"
Potter is upset when General Waldo Kent informs him that people in the 4077th are complaining about his leadership. Potter returns to camp and discovers that the complaints are coming from a Corporal (actually Lieutenant) Benson, who had been sent by a disturbed Colonel Frank Webster, who had been wounded some months earlier...and probably wanted payback for being made to wait until the real casualties were treated.
Colonel Potter meets a female soldier of the same age and interests as himself, named Lil. The others in the camp think that he might be cheating on Mildred, even though his friendship with Lil is completely platonic. Meanwhile Hawkeye tries to find out what B.J.'s initials stand for. As it turns out, he was named after his parents, Bea and Jay Hunnicutt.
Charles becomes so irate, when he is turned down for a future medical position at home, that he refuses to talk to anyone in the unit, until Hawkeye and B.J. send him a false telegram from home. Meanwhile, a young soldier, Jerry Wilson, can't remember his own identity, so Sidney Freedman is called for help.
As the temperatures reach triple digits, Hawkeye and BJ recieve their new rubber bathtub from Abercrombie & Fitch. However, soon the whole camp is hot under the collar as word leaks out about the tub and everyone wants a dip, except for Klinger, who is trying to get his Section 8 by wearing a fur coat.
A strong windstorm affects the M*A*S*H personnel in varying ways: Hawkeye and most of the unit busy themselves securing items that could blow away; Radar prepares his animal hutch for the worst; a disgusted Charles switches his Tokyo-leave transportation from air to ground, and runs into a difficult medical situation en route to Seoul.
Captain Tom Greenleigh of Stars and Stripes comes to the 4077th to write an article about Charles, which makes him act even more egotistical than usual. Meanwhile, Margeret finds out her estranged husband Donald has tied up their joint account, while fending off at first -- then accepting -- the advances of Greenleigh. Klinger dresses up as various movie characters with the hope that Stars and Stripes will write about how crazy he is.
Heavy casualties are arriving, creating severe problems for the M*A*S*H unit because they are nearly out of Pentothal. Mulcahy takes up a collection from everyone - including a case of wine from Charles' private supply - and he and Charles take the jeep to make a trade with the black marketers for Pentothal.
B.J. almost becomes the surrogate father to a Korean family. Finding them a substitute for his own absent family, B.J. spends so much time with them that his medical efficiency begins to suffer, and Hawkeye worries about his health. B.J.: "First they take me from my wife and kid, and just when I find something to help fill the gap, they take that away, too."
Talk of a post-war reunion gives BJ an idea- planning a present-day stateside gathering of 4077th families. He continues to obsess with the idea even under the duress of bug-out instigated by a Chinese breakthrough. Also, Klinger fears that the party will blow his cover, as his mother doesn't know he's stationed in Korea.
On leave in Tokyo, Radar is desperately needed back at the crisis-stricken 4077th, but his return is delayed by outside events. While casualties continue to pour in from the front, the 4077th's generator conks out, and the backup has been stolen, depriving the medical unit of all electrical power. But Klinger, filling in for the vacationing Radar, lacks the expertise and experience to wheel and deal for a new machine.
As company clerk Radar O'Reilly reluctantly prepares to depart the 4077th, the unit is still without electricity due to a broken generator, and the operating room continues to fill up with war wounded as night falls. The responsibility for procuring a new generator falls on Klinger, who lacks Radar's masterful knack of cutting through red tape in search of much-needed supplies.
Klinger discovers that his duties as company clerk include catering to the eccentric whims of the 4077th officers. Consequently, the unusual demands by Klinger's superiors leave little time to write a letter home to Toledo. Meanwhile, the Doctors are concerned about a young soldier who appears to be mentally deficient.
A brawl at Rosie's Bar puts Rosie in the hospital, and the 4077th doctors are pressed into service as temporary saloon-keepers. Meanwhile, Father Mulcahy is apprehensive that his long-pending promotion to captain will again be denied. Potter: "The Pentagon. Weird looking building. Four walls and a spare. Monument to Murphy's Law."
Colonel Potter turns crotchety when he catches the mumps, and his condition is worsened when Winchester gets the same disease and has to be quarantined with him. A temporary replacement surgeon, Newsome, is quickly brought into the 4077th and seems to be a gem in terms of both personality and ability.
Tired of their constant complaints about the quality of recreational activities at the 4077th, Colonel Potter appoints Hawkeye and B.J. as the new morale officers. Winchester's morale has already reached a new peak: He's ecstatic about his operation on a wounded soldier, Sheridan, which saved the boy's leg, leaving only "negligible" side effects - less use of his right hand. However, the soldier was a concert pianist before the war, so Winchester obtains music written by Maurice Ravel for a pianist that had lost a hand in World War I.
Klinger redecorates his quarters, but the resultant ridicule he receives drives him to new heights in his efforts to get out of the Army. Meanwhile, the doctors are perplexed by the reaction of an Asian-American war hero who tries to kill himself when he's told that he will be going home. Sidney Freedman is called in to assist.
Members of the 4077th share their impressions of war in response to letters from fourth graders in Hawkeye's hometown. Margaret writes about how there are some patients she will never forget, whilst the Colonel tells of his days as 'Hoops' Potter. Hawkeye: "Dear Ronnie, it's a shame to let the love you have for your brother turn to hate for others. Hate makes war, and war is what killed Keith. I understand how you feel. Sometimes I hate myself for being here. But sometimes in the midst of all this insanity, the smallest thing can make my being here seems worthwhile. Maybe the best answer I have for you is that you look for good wherever you can find it."
Hawkeye, B.J., and Margaret try to save the life of a critically injured solider so that his family won't think of Christmas as the day that their father died. Meanwhile, Winchester fulfills a family Christmas tradition but has trouble maintaining the anonymity required to keep it a truly charitable act. Even Klinger lends a hand.
Hawkeye is outraged when a sensationalistic war correspondent, Clayton Kibbee, reports irresponsible G.I. stunts as tales of military valor. Kibbee: "As for the last two pints of blood, there's no big finale, no heroes. They helped an old soldier, who'd had visions of glory but finally got it through his thick head how tragic and inhumane war can be. Maybe he'll know better next time."
After losing to the Marines once again, Colonel Potter wishes there was one sport the 4077th were any good at. When Klinger mentions he can bowl, the Colonel decides to have a bowling competition. Unfortunately, he and Klinger are the only 2 good bowlers in the camp, so BJ and Father Mulcahy are "recruited" to the team. Colonel Potter becomes obsessed with winning the game, and excludes Margaret from the team because she helped the team lose at softball. Then the 4077th team hear the Marines have got a "ringer" in their team after pulling some strings..... Meanwhile, Hawkeye finds out his father is in hospital and tries to speak to him over the phone, watched by Charles, who envies Hawkeye's close relationship with his father.
Posing the theory that people will believe in anything, Charles and Hawkeye start a rumor that Marilyn Monroe plans to visit the 4077th, which gets everyone excited. Meanwhile, B.J. feels responsible when he's unable to rescue a wounded soldier, and is less than impressed when he is presented with a Bronze Star.
A wounded GI learns a painful lesson when he forms a recovery room friendship with the enemy soldier he's critically wounded. Soldier: "My boots. All he wanted was my lousy boots. His feet were freezing. I'd have done the same thing. He was just a guy like me, and I shot him. I killed him, for a pair of boots. How can I ever look at a pair of shoes again without thinking of him?"
Hawkeye is sent to a mental hospital; a freak accident causes Father Mulcahy to lose his hearing; Margaret worries about her post-war plans; Charles run across a band of Chinese musicians; BJ is sent home, much to Hawkeye's dismay; Klinger decides to stay in Korea to marry Soon-Lee; a ceasefire is declared, ending the war.