After Chico guest preaches a good sermon at Bemis' church. The people find out that they would rather have Chico preach instead of the Reverend Bemis.
The sweathogs soon tire of Freddy as leader. Mr. Woodman even admits that he misses Barbarino. Julie and Vinnie turn up at the apartment, and Mr. Kotter has a heartfelt talk with them about the situation. Fortunately, all is forgiven, with Julie moving back home and Vinnie returning to class.
A bishop (Mike's friend) tries to protect the person who shot him, but revelations in the course of the investigation start to shed suspicion on the bishop's accounting of events entirely.
With Nobby collecting for charity, Eddie is inspired to suggest 'foster parents for homeless down-and-outs'. Then he's introduced to old tramp Albert...
The Walton's house is nearly destroyed by fire and the children must live temporarily with friends. John-Boy has a difficult time to begin the task of rewriting his lost novel.
John Koenig finds himself trapped on the planet Zenno, in the home of an alien scientist and his daughter. Advanced two million years beyond Earthmen, the aliens consider Koenig their missing link. Faced with the threat of being treated like an experimental animal for the rest of his life, Koenig uses an unexpected weapon to confound his captor: love.
A con man is selling charter flights to Saturn; Wojo and Luger are sniper targets.
The Detective duo meet Larry—a friendly ex-con, deaf-mute—living at a local half-way house, when they book him on a small charge. But when the trail from a series of robberies leads to Larry being the culprit, the pair are convinced of his innocence, and that someone else is using him as the ideal pawn.
The class votes to make Freddie the new leader of the Sweathogs, taking Vinnie down a notch. Vinnie becomes so upset with the loss of his title that he quits school. When his parents become aware of this, they kick him out, and he ends up staying with the Kotters; much to the dismay of Julie, who is growing tired of the Sweathogs constantly occupying Gabe's attention and life, never leaving them any time alone together. Angry, she leaves to go to a hotel.
Needing money to get tickets to a big football game, Richie, Potsie, and Ralph decide to babysit 15 children on the night of Mardi Gras.
J.J. has been commissioned by a number's runner, Sweet Daddy Williams, to paint the portrait of his girlfriend, Savannah. In return, J.J. will get his own art display.
Frank tries to distinguish himself by selling the camp garbage, but it's Hawkeye who finds a use for it: he dumps it on a troublesome Colonel Coner.
Mumford and his colleagues decide to tell their landlord, Mr. Meaker, that they are really ghosts. The shock of this lands Mr. Meaker in the local hospital where the Rentaghost team offer to provide a conjuring act for the centenary celebrations. As ghosts they find it easy to vanish - but Mumford has some difficulty becoming visible again.
The Macahans, a family from Virginia headed by Zeb Macahan, travel across the country to pioneer a new land and a new home in the American West.
O.S.I. needs to get a stolen top-secret codebook back from elusive criminal and club owner Mark Wharton.
Howard's game-warden brother comes to Chicago to witness the mating of two whooping cranes—and stays to make a play for Howard's girlfriend.
Lou has spent the night with Sue Ann, and confides in Mary. Their friendship is almost ruined when Mary is unable to keep the secret.
While the Doctor goes to confront the Sisterhood to seek a cure for Sarah Jane's blindness, Solon realizes that he must transfer Morbius' brain into a new body before it is too late.
The crew of Los Angeles County Fire Department Station 51, particularly the paramedic team, and Rampart Hospital respond to emergencies in their operating area.
Live from New York, It's...Chevy Chase Sketches include--Suicide Prevention, "Samurai Deli", Operation Stumblebum, "Citizen Kane II", King Bee(the Blues Brothers), Auto mechanic tells bedtime story, "Presidential Foreplay", Chevy misuses a joint, The Constipated Man, The Muppets and the Japanese sex Device.