After Chet brings home a hippie, Harry does everything he can to get him to leave. Meanwhile, Ralph and his Company B anti- communist force track the hippie, mistaking him for a communist. Once Harry decides to beat the hippie at his own game, he becomes the new target of Ralph and his cronies. They construct the ""Great Wall of Elm Street"" in an attempt to save the rest of the neighborhood from being exposed to these ""traitors"". The media attention, caused by this, results in the hippie leaving.
Fed up with Chet's mooching, Harry decides to put his foot down and decides to charge him not only rent, but also for his food. This finally forces Chet to finally go to work. However, the only job he can find is in a head shop. He even comes up with an invention to sell at the shop; a light-bulb that looks like a candle, which Harry thinks is a stupid idea. However, when the candle becomes a huge success he sees that his oldest son could finally be getting the message that money isn't exactly the root of all evil.
Chet announces that he finally has met "the one" and announces that he intends to spend the rest of his life with her. However, Harry and Irma are shocked when they find out that spending the rest of his life with the girl doesn't necessarily mean getting married when he tells him that he will be living with her and that he still won't go to work, but will live off the system.
Jamie brings home a mouse that he intends to not only keep as a pet, but to train so he can charge admission when it performs. However, this doesn't sit well with Irma and Alice who are both deathly afraid of it. Harry, behind Irma's back, tells Jamie he can keep it as long as it stays in the garage. Unfortunately, when the mouse turns up missing, Jamie blames Harry and decides to run away from home.
Once again Harry tries to get a job for Chet. Unfortunately, his efforts fail when Chet calls for a recall of several perfectly good pots made at Harry's plant. However, Harry's anger at his son turns to concern as Chet gets his draft notice. Chet then shocks his father by announcing that he will avoid the draft by escaping to Canada. Now Harry must try to not only try to delay Chet's induction, but try to keep him out of prison for draft evasion.
Irma informs Harry that she may be pregnant with their fourth child. While he is both excited and terrified about the prospect that he is about to become a father again in his mid 40's, everyone else seems to be against the idea. Ralph is afraid that the baby might turn out to become a radical and Harry's accountant thinks that the baby might lead to financial ruin. However, he is most horrified by Chet and Alice's reaction as they don't want to see a new baby arrive in an already overcrowded world.
After a rash of burglaries in the neighborhood, Ralph calls a meeting on how to deal with the problem and it immediately turns into a recruitment rally for his vigilante group. Unfortunately, another burglary takes place during the meeting and Harry becomes a suspect not only due to the fact that he left the meeting early, but that he was seen the next morning rummaging through one of the neighbor's windows while looking for Julius. Now he must clear his name before Ralph and his vigilantes put him in front of a firing squad.
Chet informs Harry and Irma that he is going to meet with some of his former college classmates to discuss their future. At first they think that Chet is going back to college to finally earn his degree. However, they are shocked when he tells them that the guys he met with are all dropping out of college to form a rock band and the he is going to be their manager and after the group has a major hit with their first single, Chet goes on a spending spree. However, he soon finds out that success in the music business can be fleeting.
Harry takes his family on a camping trip to break them of their addiction to TV, but after a few days in the woods, Harry wants out.
Irma's mother visits and insists that Alice be allowed her freedom since she is a woman. Alice enjoys her freedom to do as she pleases, but soon realizes that there's a downside to too much freedom.
The Boyles call an exterminator to get rid of the bees in their backyard, but the exterminator ends up being more of a pest than the actual bees. Guest star: Don Knotts as Charlie "Bumbles" Johnson
While collecting back payment, Harry helps an old woman open a service station for motorcycles. Guest star Jonathan Winters as Maude Frickert
Originally aired on "Love American Style" and later made as a series "Wait Till Your Father Gets Home" An old-fashioned father is caught between the hip generation and a reactionary neighbor.