Laverne & Shirley - Season 4 - Eps 15: Who's Papa?
Shirley finds it odd that she is small and brunette when everybody else in her family is tall and blonde, so she takes it on herself to find out if she's adopted or not. In the end, she get a speech from Laverne about ""does it really matter if you're adopted or not, when you're current family loves you"". Needless to say when Shirley opens the hospital medical records, she finds out that she's not adopted after all.
About Laverne & Shirley

Title: Laverne & Shirley
First Air Date: 1976-01-27
Last Air Date: 1983-05-10
Status: Ended
Rating: 7.2/10 (from 65 votes)
Language: EN
Seasons: 8
Total Episodes: 178
Network: ABC
Genres: Comedy, Family
Production Companies: Henderson Productions, Miller-Milkis Productions, Paramount Television
Synopsis
Best friends, roommates, and polar opposites, Laverne DeFazio and Shirley Feeney work together at the Shotz Brewery in Milwaukee and keep each other's spirits up at home.
Cast

Penny Marshall
Laverne DeFazio

Cindy Williams
Shirley Feeney

David L. Lander
Squiggy

Michael McKean
Lenny

Phil Foster
Frank DeFazio

Eddie Mekka
Carmine Ragusa

Leslie Easterbrook
Rhonda Lee