"Larry's Sister"
Season Seven, Episode #12
#140 in Series
Series: Three's Company
Network/Country: ABC-TV / USA
Air date January 11, 1983
Production code
Written by Paul Wayne
Directed by: Dave Powers
IMDB IMDb logo Larry's Sister
Cast Information
Starring: John Ritter
Joyce DeWitt
Priscilla Barnes
Don Knotts
Richard Kline
Guest stars: Lucinda Dooling ... as Diane Dalliapoulos
Episode guide
Episode chronology
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Breaking Up Is Hard To Do Bob and Carol & Larry and Terri
List of Three's Company episodes

Larry's Sister was the 12th episode of Season 7 of Three's Company, the 140th overall episode in the series. Written by Paul Wayne, the episode was directed by Dave Powers. It first aired on ABC-TV on January 11, 1983.


Larry completely trusts Jack to show his teenage sister around town — until he discovers that they are still out at 2 A.M.


When Larry's teenage sister, Diane, comes to visit, Larry asks Jack if he'll show her around since Jack is the only guy Larry trusts. But Larry's role as an overprotective big brother gets way out of hand when he discovers Jack and Diane are both gone at 2:00 A.M. Since the note Jack left on the bathroom wall fell off, Janet and Terri also believe Jack was taking advantage of Larry's sister.

When Terri discovers the note, the girls quickly apologize to Jack. But after all, going on a grunion run did seem a little unbelievable. At any rate, the girls have their work cut out trying to get the two best friends back together. After hearing the truth, Larry still insists that Jack apologize first. Janet, knowing Jack's stubbornness, finally gets an idea when she sees Jack angrily chopping onions, with tears streaming down his face. She tells Larry Jack is "too broken up" to apologize. Touched, Larry takes the bait and apologizes first.

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