Character mistake: As he takes the elevator for the garage, Magnum's hat gets caught in the elevator doors before the camera cuts away. It's all fine on his head when he gets out. (00:42:15)
Magnum, P.I. (1980)
1 character mistake in ...By Its Cover
Starring: Tom Selleck, Roger E. Mosley, John Hillerman, Larry Manetti
Don't Eat the Snow in Hawaii - S1-E1
Continuity mistake: When Magnum drops the ring out of the envelope, nothing is near it as it's shaking. In the close up shot, it's next to keys. (00:44:20)
Mac: Time has little to do with infinity and jelly donuts.
Trivia: Tom Selleck is the only actor to appear in every episode of the show.