Aired: 9/28/1979
The Drummond family welcomes the Alders to New York City. As Larry auditions there for a television talk-show. The crossover starts on Diff'rent Strokes S02E03 Feudin' and Fussin' (I).
Aired: 10/5/1979
Diane, thinking Ruthie is too much of a tomboy, gets Ruthie persuaded to go to a school dance. Then soon enough Ruthie develops a crush, on a boy.
Aired: 10/12/1979
Larry's ex-wife Marion comes to visit while Larry has to leave town with Morgan on a business trip.
Aired: 10/19/1979
Ruthie keeps hoping her parents will get back together and tries much persuasion. Larry and Marion go out and have an interesting evening.
Aired: 10/26/1979
Larry and Marion announce they are getting remarried. However, they run into problems on where they will live and where they will work.
Aired: 11/7/1979
Larry, in dire need of funds to buy a house for his daughters, is offered big money to be a nude emcee for a nude beauty contest.
Aired: 11/14/1979
Morgan becomes Larry's boss and Larry is jealous of her new position and promotion.
Aired: 11/21/1979
Marion's (Shelley Fabares) new fianc'e comes to visit and mentions he and Marion will be seeking shared custody of the girls.
Aired: 11/28/1979
The Alders go to New York City one more time, as Larry tries to pitch the sale of a television station he wants to manage to Philip Drummond's company. The crossover starts on Diff'rent Strokes S02E10 Thanksgiving Crossover (I).
Aired: 12/5/1979
Huge trouble arises when Diane develops a big deinking problem.
Aired: 12/12/1979
Tommy has to temporarily move in with the Alder's while his mother is away.
Aired: 12/19/1979
Larry's father moves in and against Larry's wishes, he gives Diane money to buy a car.
Aired: 1/9/1980
Larry's ex-wife Marion sends a sizeable check to help him buy a house for his daughters. And in the process, it challenges Larry's pride.
Aired: 1/16/1980
Ruthie gets in a fight with her new piano teacher who is very much disliked. He dies after their argument and Ruthie feels responsible for his death.
Aired: 1/23/1980
Morgan's blind nephew gets a sympathetic Ruthie to be his date.
Aired: 1/30/1980
Larry meets a female tenant ( who happens to be Tommy's mother) in his building's laundry room and things get very serious.
Aired: 2/13/1980
Larry uses his radio show to protest destruction of a local hotel housing senior citizens. He then ends up in jail and is fired from his radio job.
Aired: 2/20/1980
Larry seeks new job offers after the loss of his job.
Aired: 2/27/1980
Morgan also finds herself jobless and Larry the confronts the station's boss's son, in order to at least try to get her job at the radio station.
Aired: 3/5/1980
Diane meets and falls for a rock star and may be leaving the home for the rock star.
Aired: 3/12/1980
Diane must make a very important choice. She must decide between either her new love (the rock star) and her family.
Aired: 4/2/1980
Tommy asks Larry for advice on women. Soon, Tommy is in very serious trouble at school for kissing a girl in a broom closet.
Aired: 4/30/1980
Morgan's new secretary dates Larry's father and we soon find out that marriage is in their plans.