Three's Company - Season 2 - Eps 21: Will the Real Jack Tripper...
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.
About Three's Company

Title: Three's Company
First Air Date: 1977-03-15
Last Air Date: 1984-09-18
Status: Ended
Rating: 7.702/10 (from 161 votes)
Language: EN
Seasons: 9
Total Episodes: 171
Network: ABC
Genres: Comedy
Production Companies: Unknown
Synopsis
When two single girls, Janet and Chrissy, need a roommate to share their Santa Monica apartment, they decide to offer a room to Jack, a man they find passed out in the bathtub after the going-away party for their last roommate. However, hijinks ensure when Jack must pretend to be gay in order to throw off the scent of the trio's conservative landlady.
Cast

John Ritter
Jack Tripper

Joyce DeWitt
Janet Wood

Priscilla Barnes
Terri Alden

Don Knotts
Ralph Furley

Richard Kline
Larry Dallas