Jeffrey runs afoul of the trustees when a grieving husband has second thoughts after allowing him to test an artificial heart on the body of the man's newly deceased wife; Alan comes to the rescue when a patient's HMO refuses to cover Aaron's operating on her very complicated and potentially fatal brain tumor; Jeffrey visits his wife Laurie, a straitjacketed patient in a mental hospital who apologizes for drowning their son Joey; Arthur's refusal to remove his wagging finger from Jeffrey's face during an argument leaves him with a bitten digit, and enables Jeffrey to diagnose the curable medical condition that's causing Arthur's resting tremor.
Arthur nearly fires Danny for failing to adhere to triage protocol, thereby delaying the treatment of a critically injured prostitute with AIDS; Phillip becomes the acting chief of staff after Hackett suffers a fatal heart attack during a little afternoon delight with Angela in the MRI room; Jeffrey and Arthur argue over the future of a baboon with the potential to prolong the life of Jeffrey's patient with heart failure and Arthur's patient with AIDS.
Jeffrey tells Nadine about Laurie's schizophrenia and the death of his son; Aaron and Camille grieve about their impending divorce; several members of a family of trapeze artists are brought into the hospital in critical condition after a devastating accident during a circus performance; one of Aaron's former patients reveals his bigotry when he refuses to allow Nadine to remove his diseased gall bladder and insists that Aaron or another Jewish surgeon perform the procedure; Jeffrey exhibits signs of a meltdown when, in the space of a few hours, outrageous conduct in a nightclub gets him mistakenly arrested for soliciting a prostitute and he vandalizes the car of a man who stole his parking space; Phillip incorrectly attributes Aaron's angry outburst at one patient minutes after losing another young patient in surgery to tensions with Camille, and threatens to fire Camille if there's a recurrence.
Phillip's religious beliefs and Jeffrey's grief over the death of his son put them on opposite sides of whether to convince a young mother to remove her infant from life support so that her daughter's organs can be donated to save the life of another baby; Karen deflects a flirtation from Jeffrey, but romantic sparks fly between her and Aaron.
Aaron, the staff, and the patients are caught in the crossfire when Antoine Metcalf, a gangbanger and career criminal, follows his latest victim into the E.R. to finish off the job he started, and sprays a room with automatic gunfire before hospital security shoots him down; Karen joins the staff, and successfully teams with Paula to remove hematomas that are preventing Marcus Lavelle from walking, but the trauma of witnessing his mother's being injured in the E.R. shooting leaves the little boy afflicted with hysterical paralysis and still unable to move although the surgery has left him physically fine; reluctantly operating on the shooter, Aaron jokes about how easy and perhaps appropriate it might be to cause Metcalf's death through a surgical hiccup, a remark which comes back to haunt him later when Metcalf dies soon after surgery and his family sues Aaron and the hospital for failure to provide adequate care; Arthur engages in a little ex parte communication to put in a good word
After Karen begins having seizures, Aaron discovers that she is terminally ill from the multiple brain metastases of a melanoma; Jeffrey resents having to perform surgery on a mobster about to enter the witness protection program; when the residents attempt to pull a practical joke on Jeffrey, they unwittingly provide comfort to a dying Karen.
Camille has an innocent and unavoidable mishap in the operating room during a heart transplant on the rabbi who performed her wedding ceremony to Aaron, and blames herself when the rabbi dies later, even though her mishap had nothing to do with his death; an inexperienced new nurse stands up to Arthur; wracked with guilt, Camille reveals the operating room mishap to the rabbi's widow, and only Alan's ingenuity in demanding an autopsy keeps the hospital from a major lawsuit; Aaron and Camille have it out over his lack of emotional support after the rabbi's death, and each of them admit to the hurt caused by their divorce.
Tensions run high as hard truths ring out when Jeffrey, Danny, Camille, Maggie, Aaron, Arthur and Phillip are quarantined in an empty operating room after a possible exposure to Ebola; Jeffrey and Danny perform an emergency bypass after Arthur has a massive heart attack; Aaron and Camille reconcile.
The staff has its hands full when a man suffering from the after-effects of taking amyl nitrite suffers one complication after another, thereby necessitating multiple surgeries, and Alan takes one for the team right on the nose when he strains credulity in attempting to put the patient's situation in the best possible light; Geri and Jeffrey make peace; Camille contemplates having some plastic surgery after Aaron suffers from performance anxiety on their first post-reconciliation date; Jeffrey agrees to help Laurie put on the Institute's Christmas concert, but the preparations for the event begin to overwhelm her and put additional strain on her already fragile state; Danny and Maggie can't keep their hands off each other; Jeffrey confesses his despair about Laurie's condition and its effect on his life to Camille.
Phillip is unable to save a promising young boxer who succumbs to the fatal effects of steroids his father gave him to enhance his performance in the ring; a pregnant young teenager carrying a baby with a heart defect seeks Alan's help when she is unable to find adoptive parents for her infant; Aaron fires Angela after his tax audit reveals that she's been embezzling money from his pension plan.
Billy Kronk, a hotshot young surgeon and recreational hockey player, arrives in the E.R. with a critically ill teammate and immediately takes charge, steamrollering over Phillip; Alan deflects a suit by Nabbott, but not before bristling at Harold's ""toad"" routine in court and being thrown into jail for contempt; Billy convinces a psychotic mugger with a history of pica who has bitten off the finger of a concert flautist during a robbery to submit to an endoscopy to retrieve the digit; as Geri successfully completes the reattachment, Billy and Phillip discover a second finger in the thief's digestive tract, and realize that the musician has been given a digit belonging to yet another of the mugger's victims.
Laurie asks Jeffrey for a divorce so that she can marry Gilbert Weeks, a lawyer who is also a patient at the Institute; spurred by this news, Jeffrey suggests that Aaron perform an experimental procedure which may cure Laurie's schizophrenia; fearful that Laurie will no longer love him if she is cured, Gilbert goes to court to stop the procedure, citing Jeffrey's conflict of interest and contesting his guardianship of Laurie; although she is torn between the two men that she loves, Laurie decides that her future is with Gilbert and declines the surgery; Billy becomes a member of the staff, and agrees to do a consultation on Tamara, a teenaged patient of an old friend, Dr. Dennis Hancock; after Tamara is diagnosed with breast cancer and refuses to have a mastectomy and reconstructive surgery despite warnings from Billy and Geri that she will die without the surgery, Dennis uses just the right approach to change her mind and allay her fears of disfigurement.
When the gun belonging to a critically wounded police officer drops out of his holster in the E.R., the distraught brother of a man waiting for a donor heart picks up the weapon and threatens the staff unless his brother receives an immediate transplant; as Aaron and Danny operate on the wounded officer, one of the exploding bullets with which he was shot goes off and severs two of Danny's fingers; Geri performs a successful reattachment, but Danny may be facing the end of his career as a surgeon.
After Aaron successfully removes a steel rod driven into a man's head in a workplace explosion, the patient miraculously suffers no motor or cognitive problems, but begins to exhibit severe personality changes that greatly upset his family and employees; when a patient in danger of dying from an intestinal obstruction caused by his habit of eating the hair he compulsively pulls from his head refuses the surgery that will save his life, Ray's unorthodox approach to treating the patient's underlying psychological disorder -- by getting Camille to assume the persona of Dorothy Gale from ""The Wizard of Oz"" and role play with the patient -- gets him fired, even though the treatment is ultimately successful; Alan's worst fears come to light when Alicia suffers heart failure, and he lashes out at Jeffrey in his anguish.
Dr. Kronk's feelings towards his girlfriend undergo changes when he find out about her past. Geiger's heart patient develops an aneurysm which would take him off the heart recipient list unless highly experimental methods are tried. Meanwhile, Dr. Hancock's ejection from his clinic leads to bringing the HMO provider into the courtroom.
Dr. Kronk makes a rushed decision to rescue a man by amputating his leg with a chainsaw, only to discover later that the man is a place kicker. A friend of Aaron's with Parkinson's disease comes to him for an operation...bringing his own donor material. A ex-nurse is admitted into the hospital and is given special treatment by Dr. Nyland, whom she used to date.
As Jeffrey's anxieties grow over having a relationship with Geri, so does his model train layout, and he finds a fellow aficionado of the rails in Alan; after a terminally ill Charles Ellis is readmitted to the hospital with appendicitis, Dennis continues to honor his wish to stay alive as long as possible by fighting valiantly to get him the appendectomy he desperately needs; during the dinner party he arranges so that Geri and Laurie could meet, Jeffrey has a major meltdown after Laurie gets to the core of his problems with intimacy.
Dr. Nyland pulls a switch with Dr. Kronk in order to avoid a charity function, but they have to face the consequences over somecmisunderstandings. Misunderstanding fills Aaron's life when his father barges into the hospital with a patient who is also his fiancee. Geiger finally understands that he may be causing more ripples than he thought.
Diane helps her friend Allison harvest sperm from Allison's comatose husband before his life support is turned off; Aaron realizes that the reconciliation with Camille isn't working, and they agree to go through with their divorce; Billy takes Danny to task over his medical mistreatment of a mentally unstable woman; Jeffrey and Kate manage to put aside their differences over her cost cutting proposal for the hospital long enough to save the life of a young pre-med student; Alicia is christened.
Dennis struggles over whether he should listen to his gut, or to Jeffrey's advice, in treating a man who doesn't speak English; Aaron is upset when Alan gives Camille advice about their property settlement; after Billy recommends amputation to a man with a gangrenous leg, Diane offers the use of maggots as an alternative treatment, but the patient has a great deal of difficulty in overcoming the ""ick"" factor of Diane's suggestion; Phillip seriously injures his opponent in a charity boxing match; Aaron and Camille sign the papers that finalize their divorce.
Billy arrives home just in time to save his dog Gordie from the fire that's engulfed his apartment, and ends up rooming with a reluctant Danny until he can find a new place to live; when a teething Alicia keeps her father up at nights, an exhausted Alan is thrilled when Diane offers to help out; when a racist teenager on the transplant list refuses the heart of a murdered black teenager, the hospital offers it to another candidate, but the boy's mother sues to have the heart transplanted into her son; Alan decides to get back into the social swing by asking Diane out on a date; Kate's inattention to pre-op labs results in the post-op death of the transplant patient; Danny overcomes his dislike of Gordie long enough to notice that he's critically ill, and by acting quickly, saves the dog's life.
Kate is stricken when she realizes that her negligence due to exhaustion caused the death of a young woman during surgery, and considers assuaging her guilt by informing the woman's parents of her error; Billy and Danny decide to help a teenager running a unlicensed clinic for indigent patients; Judge Aldrich retires from the bench and comes to work at the hospital as Alan's replacement; Camille's drug seeking behaviors continue; Diane has second thoughts about her research project when she realizes that she's become attached to the orangutan that she's successfully infected with AIDS.
Aaron is baffled when a seizure lands Camille in the ER. Nyland's holiday vacation plans are suddenly sidetracked by a delivery of supplies to Ricky's makeshift clinic with a Santa'-clad Hancock. A promising teen athlete fears that an operation could cost him the chance to play major league baseball. Grad meets a sweet but shy veterinarian.
Judge Aldrich's tenure as Alan's replacement is cut short by illness; Amy, an old friend of Danny's from medical school, joins the nursing staff and clashes with Camille over the care of a terminally ill patient; Kate and Billy hook up, but decide that they won't repeat the experience after they clash professionally during experimental laser surgery on an elderly cardiac patient; Amy rebuffs Danny's advances.
Hancock's practice and his freedom are threatened when he saves the life of a hemorrhaging pregnant woman by aborting her fetus, which stirs up strong emotions when the woman denounces his actions. Kronk recoils at first from treating a drag queen with AIDS. Another new lawyer faces a baptism of fire as hospital legal counsel.
A heart-transplant patient returns to the hospital with chest pains and emotional and personality changes that challenge the notion of what really is exchanged in a transplant. Shutt is approached by a direct, self-confident psychiatrist who insists he perform psychosurgery on a 12-year-old boy with an obsessive-compulsive disorder that severely limits the life he can lead.
A friend of Kronk's seeks his advice about a health problem she thinks resulted from her sex-change operation. Austin treats an impressionable teenage boy with a heart condition and a crush on her. Dr. Konstadt, off her medication, acts injudiciously when Shutt seeks permission from a reluctant board to perform surgery on Eric.
Aaron proceeds with Eric Dipretto's psychosurgery while Austin campaigns for the position of chief of surgery and Bix continues to lose control. Kronk is determined to perform a controversial intestinal bypass on Nyland's former boss and good friend, a restauranteur who just wants to enjoy a good meal again.
Dr. Watters befriends a 12-year-old girl when she's admitted with an apparently self-inflected wound to her transplanted kidney. Austin has another rough day, with the shakes during a surgery and a message from her ex-husband that he might be moving to Boston and taking their daughter with him. Diane finds out about Billy's previous relationship with Kate.
Kate loses her control and her compassion when her father is admitted with an operable surgical condition but refuses it on religious grounds. Geiger turns up again at the hospital, this time as part of a clown troop there to entertain the patients. Sutton delivers a baby with ambigous genitalia whose parents are equally ambigious about they feel about their offspring.
Sutton's mind rells as wives two and three ask him for a very great personal and professional favor and wife one chacks in for a serious medical problem. Kate anxiously awaits news of who will be appointed as the new head of surgery. Dr. Shutt performs delicate surgery on a wealthy quadriplegic who cannot be anesthetized, and whose beautiful fiance attracts Nyland's attention.
Tommy places a bid to buy out the hospital with the intention of firing Kate as soon as the deal goes through; as Valerie continues her affair with Danny, Jack lets Danny know that he's aware of their relationship; Elizabeth is readmitted after Andy beats her again, and Andy takes his revenge when Dennis attempts to help his sister escape the cycle of spousal abuse; a mysterious biohazard accompanies a patient admitted to the E.R., and immediately begins to fell the staff; after Kate pleads the hospital's case, Jack agrees to counter Tommy's offer, but only if Phillip fires Danny; Kate and Tommy threaten to expose each other's secrets; after Diane's work for the last two years is called into question and her grant money is suspended, she decides to go to Africa to do research with a colleague; Tommy courts Aaron's support; feeling under-appreciated and ill-respected, Camille resigns; realizing that Tommy will stop at nothing to destroy her, a desperate Kate flees with their daughter an
Kate returns to Chicago to face possible arrest and her ex-husband, as well as suspension at work. Aaron ponders Philip's bitterness over Aaron's apparent support of Tommy Wilmette. Dennis struggles to regain his health. Dr. Nyland returns to find a new doctor in charge of the trauma service. Kronk and Grad continue to quarrel as he prepares to leave Africa.
Kate cares for her dying father and gets some words of wisdom from Tommy when he brings Sara for a visit; Philip recruits Dr. Jack McNeil to head up orthopedics; Diane returns, only to find that Billy has remained in Africa and that her lab has turned into a storage room; Keith places himself in legal jeopardy when he decides to help an injured drug courier evade arrest; Aaron persuades Tommy to give the hospital six months to turn itself around with Philip at the helm.
Aaron and Jack join forces in operating on a man who sustained multiple fractures in a parachute jumping accident; Diane rejoins the staff as a teaching attending in internal medicine, and quickly draws a demanding and manipulative patient who's making the staff miserable; Kate's grief over her father's death is compounded when she's carjacked on her way home from his funeral and his ashes are not recovered with the car; Diane unsuccessfully seeks some moral support from Dennis and Philip; after Tommy tells her some hard truths about creating her own misery, Kate decides to take responsibility for the choices she's made, and starts by telling Peggy Harrod the truth about her daughter's death; Jack takes one on the chin when he gives the parachutist's would-be bride some bad news; Kate returns home to find the carjacker has returned her father's ashes while burglarizing her home; Philip has it out with Aaron and reaffirms his intention to keep Tommy from closing the hospital.
Dennis and Jack clash over the best mode of treating the arthritic knee of a world class cyclist; Aaron makes a new friend when he takes on a new research assistant; Kate and Danny have their suspensions reviewed by the board; Phillip plunges back into patient care by performing an experimental procedure on a woman who exhibits unusual complications from a liver tumor; Caroline discovers that orthopedics are not for her; Dennis faces an emotional struggle in the aftermath of his shooting.
Kate returns to duty and finds that her reinstatement comes with a cut in title, salary, staff, and office; Jack replaces the hip of an older man who has opinions on everything, including how Jack should live his life; Aaron has mixed emotions when Grace comes up with a much-needed improvement for a surgical shunt he's been developing; Kate is humbled when a young couple whose daughter needs a heart transplant chooses another doctor after they discover her change in status; Tommy thinks it would be a good idea for the hospital to advertise, and hires a publicist who manages to get under everyone's skin as she creates a commercial that ends up looking strangely familiar.
Austin sprays a subpoena server with mace, inspiring his fellow servers to wage war on the hospital. Hancock tries to counsel a woman in her late forties whose health is severely threatened by her pregnancy but who refuses to let the baby be delivered early. Kronk finally returns to Chicago, dressed in Masai garb, and tries to reconnect with Diane.
Jack, re-energized by his descent into gambling, performs a daring procedure, attaching a man's left hand onto his right arm. Aaron treats a man who, after surgery, completely forgets the last ten years of his life and speaks in loving terms about his now ex-wife. Aaron loses his cool when his car is stalked by an irate man who feels Aaron personally wronged him by inadvertently parking too close to his van. Diane examines a mummy.
Aaron's practical joker college roommate arrives for a visit and announces that he wants Aaron to marry his widow, Aaron's former girlfriend, when the malignant and inoperable tumor in his brain finally takes his life in a few weeks; Keith and Danny continue to clash; Aaron runs into an old friend as he stumbles home after a night of drinking with his college roommate; Gina has a miscarriage, but a grieving Keith wonders if it wasn't deliberate; Karen suspects that Jack's gambling again, an accusation which he denies; Maricela puts the moves on Aaron; Karen is wary when Jack finally comes to her for help.
Aaron and Phillip announce that they are buying the hospital from Wilmette, although their plans for keping the solvent do not please any of their colleagues. An HMO lawyer obsessed with ""patient responsibilty"" holds the reins on some lucrative coronary-bypass business. A patient with private insurance receives test after test for all of his petty complaints.
Grad tries to persuade a hesitant Kronk to perform a double mastectomy on a healthy woman does not have cancer but who does have the gene for breast cancer and a family history of the illness. Austin struggles to get a reluctant Sara into an exclusive girls school. Nyland returns to work following his accident and throws himself into trying to identify a severely beaten and comatose young woman.
Word of Billy's and Diane's engagement receives a mixed reception at the hospital; Jack returns from vacation with a windfall and a feverish belief he's on a winning streak; Kate alienates some colleagues when a reporter follows her around the hospital; Jack takes on the delicate job of operating on an infant with an exposed spinal cord.
Jeffrey Geiger drops by Chicago Hope to announce that he has bought a controlling interest in the hospital, and to perform a deicate heart operation on one of Kate's patients. Kronk is forced to take over caring for his father, who's afflicted with Alzheimers. Aaron and Jack ponder the meaning of religion and God when several people claim to be seeing an image of the Virgin Mary in the hospital lobby. Wilkes takes action concerning his future.
After a little too much holiday cheer Wilkes is charged with a DUI and must serve a community service in Dr. Hancock's clinic. Watters discovers that his accountant has left the country with Watters money. Shutt turns over a patient to Catera, and the two clash over whether she should perform a dangerous surgery on the patient. Dr. McNeil is elected to play Santa and is a huge hit in the childrens ward. Grad receives her Christmas present a little early.
Catera must operate on a 5-year-old who is suddenly stricken with seizures. An HIV-postive friend of Dr. Grad's talks to Diane about getting pregnant (she wants advice) and Diane (who discovered a lump in her breast) is afraid that neither of them will see their children grow up. A mother and daughter come into the ER handcuffed together.
Catera and McNeil cross roads when her facination with his brother becomes personal. Billy begins to feel ""in over his head"" with the impending birth of his child, so at a desperate attempt at freedom he becomes involved in a bar fight. Austin introduces Danny to her daughter. Watters moonlights as a stand-up comic.
A family eats poisonous mushrooms and the mother and two sons must receive a liver transplant. A donor is found for the mother and the father is a match for the two sons. The father decides to have a live donor transplant, but is told by Kronk that only one of his children can receive the organ. Austin and Cacaci have to attend a sensitivity seminar, which only makes Austin worse. With Shutt's help a patient remembers a sexual abuse that happened during childhood, but the parent vehemently deny it ever happening. Drs. Grad and Kronk get kicked out of lamaze class.
Diane goes into labor unexpectedly and when no one can find Billy she reluctantly asks Kate to be her coach. Wilkes must get a family to safety from an abusive husband/father. McNeil and Catera take dance lessons (with special guest star Kenny Ortega, who choreographed ""Brain Salad Surgery."" Billy arrives at the hospital and discovers that Diane is having a c-section after her and the baby have gone into distress during the labor.
Dr. Watters' son is found dead in his apartment and Phillip must except the fact that he committed suicide. Dr. Austin brings her daughter to the hospital and she becomes fascinated with the blood and guts aspects of her mother's work. Dr. Catera becomes uncomfortable with Dr. McNeil's romantic pursuits, until she watches one of her patients (who is in much the same situation.)
As Dr. Wilkes takes his son to school gunfire errupts. The victims are brought to Chicago Hope and Wilkes finds himself having to deal with his sons post-tramatic distress. Kronk also finds himself viewing the situation in a new light, due to the recent arrival of his daughter. The situation also brings back memories of his son to Dr. Watters. Catera had to operate on the shooter, and feels conflicting emotions. Dr. McNeil pops the question to Dr. Catera. Austin is still turmoiled over the incident at the cabin.
The hospital prepares for the Doctor of the Year party, and several old friends drop by. Watters goes into a virus-induced coma and gets some words of wisdom from Alan Birch. Camille Shutt returns for the party and Aaron discovers he still has feeling for her. Dr. Nyland returns to the hospital and reveals that he has really changed his life. Geiger also visits the hospital.
Kate discovers that a patient is using Viagra to cheat on his wife; Jack gives a blood transfusion even though it's against the patient's Jehovah's Witness religion; a musician fears his creativity may be stifled by the medicine Aaron prescribes for his bipolar disorder; Joe's son drives the staff crazy as he roams the hospital behaving exactly like his father.
During surgery to resolve an HIV-positive woman's post-partum complications, Diane accidentally cuts herself and is exposed to the virus; problems arise between Jack and Lisa when he discovers that she's been seeing Robert; a homeless man takes shelter in the hospital's main entrance; an unidentified man is hit by a train after trying to save a child; Jack takes up golf in the hospital.