Gimme a Break! (1981)

Season 5: Episode 4

Joey is saved by a man from being hit by a bus, and when the man tells his family that he is from another planet, everyone but Nell believes him. The man says he is from Zoron, and that he doesnt have a last name, and is known as ""cute"". In the end, the man leaves, and the family still beleives he is from another planet.