A giant robot attacks Laverne in a toy store this leads her to sue the toy company.

The girls get engaged to Richie and Fonzie to avoid a shotgun wedding.

The crossover starts on Happy Days S07E01 Shotgun Wedding (I).

Laverne gets depressed and then angry after she finds a very short note from Shirley saying that she has left to go overseas with her husband who was just transferred there. Laverne just can't believe that Shirley would leave and only write a few words to say goodbye. To try and help cheer her up, each of the gang tries to find Laverne a new roommate. But things turn out okay after Laverne finds the rest of Shirley's note which had fallen under the bed.