This crazy series begins when Janet Wood and Chrissy Snow, two attractive women, have a going away party for their roommate, Eleanor (who we'll meet in Episode 44). While trying to find someone to share the rent with, they find party crasher Jack Tripper in their bathtub. They have their doubts at first but when they find out that Jack is the only one that can cook (by going to cooking school), they want him to stay. The hardest part of this is trying to convince the landlords, Stanley and Helen Roper, that Jack is indeed good company. Stanley doesn't like the idea of a man living with two women, knowing what can go on behind closed doors. Jack pretends he is gay so that he can have a place to live. It works, and the rest is sitcom history.

Jack is all set to move into Eleanor's room, until Chrissy's mother unexpectedly shows up. Chrissy's mom does not know that she and Janet live with a man, so she tries to keep them out of sight. Janet and Jack go to the Regal Beagle to hide out, and Mrs. Roper finds out that Jack is not really gay. She manages to keep it secret from Mr. Roper.

Mr. Roper sets Jack up with his niece, who turns out to be very promiscuous in her way. Jack finds out that Mr. Roper set him up in order to turn him straight, and if he is, out he goes.

Mr. Roper tries to get his old car back from Jack and the girls after someone else makes an offer to him for a lot of money.

Jack agrees to cook a gourmet meal for Chrissy's date, who happens a very fussy critic when it comes to gourmet food.

During one of their marital disputes, Stanley thinks he is attractive to a younger woman (a friend of Jack's) who befriends him as a favor to Jack.

Stanley gets Helen a fur coat, unknowing that Jack is holding the gift for Mr. Travers.

Chrissy steals Janet's date by accident, and they refuse to speak to each other. It's up to Jack to get the two girls together again.

Janet made a date at the same time as her babysitting duty. She gets Jack and Chrissy to take her place as babysitters.

Chrissy has a new boyfriend who's a film buff, so she decides to become a filmmaker. She gets a super-8mm film camera from her parents and takes lots of very amateur footage of the trio fooling around. Meanwhile, Jack' s friend Larry has some footage of his own - a porno flick he's bought from a stranger for $50. Larry comes over to borrow Chrissy's projector, expecting to have a private showing with Jack. Unfortunately, Roper spots the film and decides to join them. Then Chrissy and Janet show up and it looks like it's going to be a very embarrassing premier showing. What shows up on the screen, however, is a Woody Woodpecker cartoon. Larry is furious, but Jack is hysterical and relieved. Meanwhile, Chrissy finds out her boyfriend has no enthusiasm for her films, and drops him for a painter.

Janet offers Jack a job in her flower shop, and Jack takes that opportunity to goof off during company time. Janet wants Jack to be more serious about his job and they end up not speaking to each other. They forgive each other when Janet needs help in fulfilling an order.

Jack's blind Navy friend comes to visit him and the girls.

Because of one of Larry's tricks, Jack is in trouble. A girl calls him claiming that he might have gotten her pregnant. The girls think that Jack is the father, but actually Larry used his name when he dated her. Jack hears this and thinks that he got his recent girlfriend, Linda, pregnant.

Janet and Mrs. Roper participate in a nude beach protest, and end up walking home without their clothes.

Jack finally has a chance to get it on with Chrissy when a mouse terrorizes the apartment building.

Roper plans a surprise disco party for his wife. This is an episode of the Ropers packaged in syndication with Three's Company.

Chrissy goes to work at a convention as a hostess with an old friend of hers, not realizing the job is being a high priced call girl.

The Ropers are back in town, and Stanley has a falling out with Mr. Furley when he catches him in bed with Helen.

Jack cuts his finger and goes to the hospital. While there, he meets a sassy nurse named Terri Alden and they do not really hit it off. Meanwhile, Cindy is leaving for UCLA and Janet is looking for a roommate and finds Terri, much to Jack's dismay....

Terri tries her best to warm up to Jack, which proves to be totally unsuccessful. Jack now hates her even more and wants her out. At Cindy's going-away party, he and Larry really insult and play mean jokes on Terri. Jack has a chance to spray Terri with water, but he ends up spraying himself. He really wants Terri to stay with them and now Terri is added to the cast.

Jack pretends he is a doctor to impress his grandfather.

Jack and Janet end up in the same bed, and Jack doesn't even remember how he got there.

Jack hosts a Sunday brunch at the Bistro to prove to a pastor that it's a wholesome, family-oriented restaurant.

Rumors are flying everywhere when Terry hears one about two friends and spreads it everywhere.

Jack must pay a bribe to an inspector in order to get a health permit so he sets up a sting operation to catch him redhanded but leads the police to believe that it's a drug bust they're working on.