With Richie in a dating slump, Fonzie sets Richie and himself up on a double date with two of his girls, Laverne and Shirley.

Needing money to get tickets to a big football game, Richie, Potsie, and Ralph decide to babysit 15 children on the night of Mardi Gras.

With Potsie away, the guys try to get Fonzie to take his place as the band's singer for the Senior Dance.

Fonzie survives an explosion at the garage triggered by the counterfeiters. The counterfeiters don't know that Fonzie has survived, so a phony funeral is staged at their funeral parlor to entrap them.

The Cunninghams and Fonzie go on vacation to Lake Pinewood. Richie and Fonzie get together with two lonely milkmaids, and, when their father catches them in his barn with his daughters, he says they will have to get married.

The crossover continues on Laverne & Shirley S05E01 Shotgun Wedding (II).