-- Used the same soundstage in Hawaii as "Hawaii 5-0
-- Magnum was killed off at the end of the 1986-87 season because producers thought the show had been cancelled. When it was renewed, Magnum spent the first episode or two as a ghost and was brought back to life. Die-hard fans contend there is evidence throughout the final season that indicates Magnum never came back to life at all, and they point to clues in the final episode, such as the revelation of Robin Masters' identity (contradicting evidence in earlier episodes), Magnum's instant changing into a Navy uniform and haircut, and the fact Magnum is seen with what might be his dead daughter in the final scene. An alternate point of view contends that Magnum is killed for real in the final episode, and that the last scenes take place "in Heaven."
-- By the time the series went into production, the movie "Raiders of the Lost Ark" was being filmed. Tom Selleck was originally chosen to star in the film, but his commitment to Magnum, P.I. prevented him from doing so.
(Posted by Stephen Strong)