Jack pretends he lives alone when he falls for a woman he believes is old-fashioned, but it turns out she has a living situation that mirrors his own.

Jack gets angry with the girls and moves out of the apartment.

Roper plans to sell the apartment house as an anniversary surprise for Helen. This  sets off the premise for the spinoff series "The Ropers".

Chrissy eats the pie Jack was going to enter in a statewide baking competition.

Janet and her date find Jack and Chrissy in bed.

Jack offers to protect Chrissy from a mouse.

Chrissy recommends Jack for a catered event her boss is hosting. Janet and the Ropers help him work the event. 

Able to hear the roommates talking through the plumbing while working on his own bathroom sink, Mr. Roper overhears things that make him convinced Chrissy is pregnant.

Jack falls in love with an older woman.

Eleanor, the girls' roommate prior to Jack moving in, returns for a visit. Jack suspects the girls may want her to move back in.

Mr. Roper's dirty trick prompts his wife to leave.

Jack and Janet suspect Chrissy is a kleptomaniac.

A 13-year-old who is the daughter of friends of the Ropers stays with them for a few days, and develops a crush on Jack.

Chrissy plans a business trip with her boss.

The girls accuse Jack of wanting Larry's fiancée.

A guru dazzles Chrissy into following him to his commune.

Janet finds Jack in bed with her visiting sister.

Jack, Janet and Chrissy think that Helen is having an affair.

Jack and Chrissy compete in a test of willpower.

Mr. Roper thinks the candid diary Chrissy is transcribing is her own.

Janet convinces Mrs. Roper to join her in a nude beach protest.

Jack lies to his girlfriend in order to keep a date with his new romantic interest.