This show starts out in Apartment 201 with Chrissy cleaning the apartment. Later, Janet wakes up exhausted from last night's party, which was for their roommate, Eleanor Garvey, who moved out and got married. Chrissy goes in the bathroom and finds a man sleeping in the bathtub. She calls Janet and the two of them investigate. Soon, the man wakes up and introduces himself. His name was Jack Tripper and he lived at the YMCA. He was a student at cooking school and attended the party with some friends. Suddenly, Janet and Chrissy thought of an idea...Jack could be their new roommate! The three of them think it's a great idea, but their landlords, Stanley Roper and Helen Roper don't, especially Mr. Roper. Jack tells Mr. Roper that their living arrangement will be strictly platonic, but that is not enough to convince him. Finally, Mr. Roper agrees to let Jack stay...after Janet tells him that Jack is gay!
AIRDATE: March 15, 1977
Jack brings his stuff and starts moving into the apartment. Chrissy then gets a phone call from her mother and remembers something...her mother doesn't know that Jack has become the new roommate! Jack tells Chrissy he'll leave for awhile and he goes to the Regal Beagle with Janet, where they see Mrs. Roper. Mrs. Roper asks Jack if he is really gay, and soon gets him to confess that he isn't. But she is very understanding and promises not to tell Stanley. That night, Chrissy's mother decides to spend the night and sleeps in Jack's bedroom, but does not know it is his room. Jack sleeps in the girls' room for the night Chrissy then realizes that the window is open in the living room and becomes afraid that someone can go in. Jack goes outside to try and close the window, but instead falls out and comes back in soaking wet from the rain. Chrissy then tries to tell her mother the whole story, but her mother already knows Jack is living with Chrissy and Janet. Mr. Roper told her earlier!
AIRDATE: March 24, 1977
It is Janet's birthday and Jack and Chrissy are planning her party. Later, Mr. Roper asks Jack if he will take his niece out for the night, thinking that nothing will happen because he thinks Jack is gay. Jack declines because he can't picture dating someone who is related to Mr. Roper. But then, Mr. Roper brings his niece, Karen, up to the apartment and she turns out to be beautiful. Jack agrees to take her out for the night and he makes Janet very sad. He promised to stay for her birthday party but goes out with Karen instead. Janet and Chrissy are mad at Jack for the rest of the night since he betrayed them. Later, Jack and Karen go down to the Ropers' apartment when suddenly Karen flirts with him incredibly. Stanley then enters, gets the wrong idea, and tells Jack to pack his bags and leave. Jack comes back home to 201 and starts to pack. Janet and Chrissy soon find out that Stanley threw him out, and later when Stanley comes upstairs Janet and Chrissy get mad at him. He explains that Jack can now stay because Karen confessed to him that she "attacked Jack." At the end of the episode, Jack buys back Janet's cameo that she needed to sell for rent money. The three of them hug and Janet has a wonderful birthday.
AIRDATE: March 31, 1977
Jack's friend "honest Larry" (who we later get to know as Larry Dallas who lives upstairs) brings with him a puppy and gives it to the trio. The three of them love it, but Janet tells them they can't keep it because Mr. Roper doesn't allow pets in the building. Throughout the day, the trio decides to try not to make it obvious that they have a puppy. Helen comes in later that night and sees some food on the table. It is dog food, but Jack tells her it is a French dish he made in cooking school. She takes it and decides to feed it to Stanley. Jack, Janet, and Chrissy panic and Jack goes downstairs to the Ropers' apartment and takes Mr. Roper's dinner. He goes to the bathroom and puts it down the drain. Mr. Roper later explains that he really did eat the "French food" and what Jack put down the drain was Helen's stew that she made. Mr. Roper loved the "dog food" and told Jack it was delicious. The next morning, the puppy is missing. Jack and Janet wonder what could have happened to it. Then, Chrissy explains she left it in front of the Ropers' door and watched Mrs. Roper bring it in to the apartment.
AIRDATE: April 7, 1977
Jack, Janet, and Chrissy are all working in the apartment. Jack and Chrissy want to take a break, but Janet wants to get the job done. They then agree to go to the Regal Beagle for awhile, when suddenly a guy comes to the table and won't leave the girls alone. Jack tries to protect them, but can't stand up to the big guy. The three of them then go home and Jack feels guilty that he couldn't stand up to him. Later at the Regal Beagle, that same guy spills a drink on Stanley and Stanley insults him and stands up to him. The guy tells Stanley that at least he's brave enough to say something like that. Jack, Janet, and Chrissy go back to the Regal Beagle and see the guy again. Janet tells him that Jack fought in a war, and this time, the guy leaves them alone.
AIRDATE: April 14, 1977
Jack and Janet enter and see that they have left the door open. They panic because their radio is missing, but then Chrissy explains that she took it to be fixed.They calm down, but then they notice something even worse...their rent money is missing!!! They call the police and when a police officer comes, he doesn't believe that their rent money is really stolen. He thinks they are just trying to get away with not paying their rent and he leaves the apartment. Jack tries to get a loan from cooking school from his loan officer, Mr. Travers, but is unsuccessful. Downstairs, Helen wants to take the kids upstairs out to dinner, but Stanley doesn't. He eventually agrees and they go upstairs to ask the trio. Jack, Janet, and Chrissy get scared because they think they want to talk about the rent. They don't, and the trio calms down. Stanley wonders why they are worried about the rent because he already took the rent money earlier...but didn't leave a rent receipt!
AIRDATE: April 21, 1977