Diff'rent Strokes — Season 4

Willis plans to make love to Charlene for the first time.

Willis has trouble making friends at his new school, until it's discovered that his family is rich, so he gets asked to buy marijuana for a party.

Kimberly's job leads to her beginning a modeling career.

Willis want to sue the school because their Affirmative Action policy affects him, meaning he won't be on the team.

Arnold attempts to steal an expensive comic book to get into the Gooch's club and gets taken to court when he's caught.

Arnold gets his first date with a girl he likes, but things turn sour when Dudley butts in on them.

Kimberly goes on a ski trip with her friend, but doesn't let the family know that there will be boys there. Mr. Drummond and Willis end up surprising her by paying an unannounced visit, but get surprised themselves when they see the boys.

Arnold and Willis try to get into Mr. Drummond's health club, but are turned away because they are black. When Drummond is honored by the club, a confrontation takes place.

Drummond's building project is discovered to be on the site of an Indian burial ground, which leads to a conflict with a member of the Indian tribe.

The son of a woman Mr. Drummond knew during the Korean War shows up claiming that Mr. Drummond is his father. This leads to a reunion with the woman and the truth about who the father really is.

When Charlene feels Willis is taking her for granted, she dumps him. Willis soon hears she's seeing another guy and he decides it's time to move on, but Arnold has plans to bring them back together.

Arnold begins having nightmares after he finds out Mr. Drummond is going on a business trip, so a therapist is needed to unlock Arnold's fears.

Arnold gets reassurance from Kathy when he plays Abraham Lincoln in a school play, but when he tries to get her to use her crutches instead of sitting in a wheelchair, she is furious and blows his confidence before showtime.

A fire has the family trapped in the building and when smoke starts coming through the vents, it makes everyone think the end is near.

A woman becomes a squatter in the Drummonds' house after she is forced out of her apartment due to a condominium conversion Mr. Drummond is involved with.

Willis takes the car out without Mr. Drummond's permission in order to pick up Charlene for a date and gets in trouble when he hits a police officer's motorcycle.

Arnold and Dudley are harassed by two bullies who force them to hand over their lunch and money. Willis decides to interfere and gets more than he bargained for.

After Willis is hospitalized for trying to stop the bullies, Arnold is asked to participate in a sting operation to nab them. When Mr. Drummond refuses to allow this, Arnold takes matters into his own hands, as he feels responsible for what happened to Willis.

Willis lets his potential membership in an exclusive club go to his head, but falls hard when he alienates the club members.

Kimberly's hair turns green before a date, due to using a copper bowl affected by acid rain to wash her hair, which gets the Drummond family talking about how to help the environment.

Mr. Drummond has a good time going out with a hairdresser, but when he doesn't invite her to a posh party, she feels like he is secretly embarrassed by her.

Willis saves Arnold's life, so Arnold feels obligated to dote on him constantly. In order to get Arnold off his back, he sets up a fake robbery at his job so Arnold can save him and even the score. When Arnold finds out what Willis is up to, he decides to have a little fun with the "robber," not knowing that a real robber has come to hold up the place.

Willis finds out he has very high stress levels, so Mr. Drummond wants him to lay off on his extracurricular activities, much to Willis' chagrin.

Willis joins a musical group and wants Charlene to join as well, but Kimberly ends up impressing his bandmates so much that they want her in the group instead.

Arnold isn't interested in celebrating his birthday because he feels girls aren't interested in him, particularly one girl he really likes, but things change when he invites the girl to his party. However, his intentions aren't made clear and she comes to the party with someone else.

Arnold attends Kimberly's ballet recital and decides he wants to learn ballet, which makes Willis very uncomfortable and he tries to put a stop to it.