Starring: Tom Selleck, Roger E. Mosley, John Hillerman, Larry Manetti
Basket Case - S3-E14
Revealing mistake: Magnum's team loses by some extraordinarily bad luck, since the whole laws of physics conspire against him; the ball hits the hoop following a counterclockwise motion without going in, but in the last shot, when it flies away, it is spinning clockwise. (00:45:10)
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)
Trivia: Tom Selleck is the only actor to appear in every episode of the show.