Mon---"Mork Returns" Episode #142.

Richie explains human relationships to alien Mork.

Tue---"The Duel" Episode #140.

Fonz duels a Frenchman who insulted America and Joanie.

Wed---"Chachi's Incredo-Wax" Episode #141.

A con man convinces Chachi to sell a `miracle' wax.

Thu---"Potsie Quits School" Episode #136.

A professor's insults make Potsie want to quit school.

Fri---"Shotgun Wedding" Episode #145.

Guest stars: Penny Marshall & Cindy Williams ("Laverne & Shirley")

Fonzie and Richie run afoul of a hillbilly father.