Harry is stuck inside the mansion in a parody of Home Alone. Most of this episode is Fred explaining what Maniac Mansion is about. He tells stories...

Casey complains about how the living room looks, and wants to redecorate it. Fred doesn't want to, but eventually gives in and tells Casey to go...

Harry watches a talk show that Idella hates. She tells him that he has as much talent in him as all of their guests put together. This inspires him...

Turner has been exceptionally bad lately, and after breaking a cookie jar Casey sends him to his room. Ike tells him that he should fake running...

Fred invents a computer called RD-12 that has true artificial intelligence. Fred and Tina feed him scientific data to improve his knowledge. ...

Idella and Casey have been bothering each other a lot lately. Fred tells Casey and Harry tells Idella to rise above it and not to fight. Later,...

During dinner, a cab gets into an accident outside of the house. It turns out that Jose Ferrer was in the cab and has hurt his ankle. So the...

Tina and her friend Val go out to see a movie. During the show, Val acts mad at Tina. Val feels that her boyfriend is falling all over Tina and...

Fred finds a book in the lab called ""My Forbidden Experiments"". He decides to perform one of them, and creates an odd slime creature which he...

Lenny met a girl in France and they are planning to get married. She comes to meet the family, and things go well. Later, Lenny tells Teri he can't...

Lenny is in a coma at the local hospital. The doctor tells the family that there's nothing he can do except wait until Lenny decides to come out of...

Fred develops a machine that increases human intelligence. Fred tries it on himself and likes the results. However, he steadily becomes more...

A new neighbor moves in, and visits the Edisons. He's part of the witness relocation program because he ratted on a mob family. He thinks Fred is...

Casey's parents are having a party for their 50th wedding anniversary. Everyone's going except for Fred, who sprained his toe and is stuck in bed. ...

Ike likes a girl in school, so he asks her to the dance. She agreees, and everything seems to be going fine. However, at the dance Cherie tells him...

Fred's friend Eddie from high school shows up at the mansion. He's an actor who has had problems with drinking in his past. After getting shot down...

Tina asks Fred if she can go on a ski trip, and he says yes. However, she'll have to watch Turner and Ike when everyone else goes on vacation. As...

Casey gets a call from Allasyn asking if she'll watch her sister's baby. Casey agrees, but wishes she didn't because the baby is colicy. Turner's...

Idella's Aunt Hildie announces that she's coming to visit, but Idella doesn't want her to. When the rest of the family asks why, she flashes back to...

Fred performs an experiment from a book called ""My Forbidden Experiments"". At first nothing happens, so he leaves. Later on, the machine works...

Idella goes to a psychiatrist because she's been having problems with Harry. She starts telling her story, but stops because she doesn't want to...

In the future, Tina is talking to her daughter about her new group of friends. Tina is concerned that she is dropping her old friends for this...