The Greatest American Hero (2) - S1-E2
Continuity mistake: At the end, when the aliens appear in the desert again, Ralph is in the front seat of Pam's car as the aliens suggest Ralph try invisibility, but after Ralph shouts that he lost the instruction book, when it cuts to a long shot Ralph is standing in front of Pam's car, then he's back in the front seat. (00:44:00)