Plot: The girls get engaged to Richie and Fonzie to avoid a shotgun wedding.
The crossover starts on Happy Days S07E01 Shotgun Wedding (I)

Laverne & Shirley - Season 5 - Shotgun Wedding (II) (Episode 1)
Episode Aired On:
Thursday, September 13 1979
45 years ago
Thursday, September 13 1979
45 years ago
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Episode 2