The Banker and the Bum - S1-E20
Revealing mistake: Jonathon is supposed to be invisible when the bum is talking to the limo driver but he walks past the driver and casts a blatant shadow on him.
Highway to Heaven (1984)
1 revealing mistake in The Banker and the Bum - chronological order
Starring: Michael Landon, Victor French
Another Song for Christmas - S1-E13
Audio problem: At the very beginning the audio track of the outside noise at the dealership seems to have been laid wrong. It runs into the next interior shot and abruptly stops.
Mark Gordon: I got the stuff! I got the stuff.
I Was a Middle Aged Werewolf - S4-E5
Trivia: When Mark is in the motel room watching TV, the movie he is watching is "I Was A Teenage Werewolf", starring a young Michael Landon, star of this show.