Gimme a Break! - Season 3 - Eps 15: Knock Three Times
Nell gets hypnotized to remember where she put Katie's ring for graduation, but she ends up remembering a whole lot of the girls' dirty laundry, since the doctor forgot to remove the hypnotic transe, and whenever she heard three knocks, she'd tell the absolute truth. In the end, she tells everyone that she is going to marry James, but tells him the truth that she can't marry him yet, that is until the kids are all grown up.
About Gimme a Break!

Title: Gimme a Break!
First Air Date: 1981-10-29
Last Air Date: 1987-05-12
Status: Ended
Rating: 6.7/10 (from 27 votes)
Language: EN
Seasons: 6
Total Episodes: 137
Network: NBC
Genres: Comedy, Family
Production Companies: Reeves Entertainment Group, Alan Landsburg Productions, Mort Lachman & Associates
Synopsis
Gimme a Break! is an American sitcom which aired on NBC for six seasons, October 29, 1981, until May 12, 1987. The series stars Nell Carter as the housekeeper for a widowed police chief and his three daughters.
Cast

Nell Carter
Nell Harper

Lara Jill Miller
Sam Kinisky

John Hoyt
Stanley Kanisky

Joey Lawrence
Joey Donovan

Telma Hopkins
Addy Wilson

Matthew Lawrence
Matthew Donovan

Paul Sand
Marty

Rosie O'Donnell
Maggie O'Brien

Rosetta LeNoire
Maybelle Harper