Factual error: It is stated in the episode twice that Rod 'did time' in Camarillo, but Camarillo does not have a penitentiary, just a jail and (had at the time) a State mental hospital, neither compatible with his 18 months sentence for growing weed. (00:25:00)
Magnum, P.I. (1980)
1 factual error in ...By Its Cover - chronological order
Starring: Tom Selleck, Roger E. Mosley, John Hillerman, Larry Manetti
Other mistake: With power out Magnum somehow lights the gas stove with the knob, which is electric. Should have used a match. (00:26:40)
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Trivia: Tom Selleck is the only actor to appear in every episode of the show.