Trivia: In the opening credits of the black-and-white episodes, the US flag at the marina is at half-mast because the opening was filmed shortly after the Kennedy assassination.
Trivia: The opening theme of season 1 ends with "And the rest". At the insistance of Bob Denver (Gilligan), "And the rest" was replaced with "The Professor and Mary Ann". Denver wanted equal credit for all actors/actresses.
Trivia: Mrs. Howell was commonly referred to as "Lovey" by Mr. Howell and viewers know her by that name. Her first name actually was Eunice (though that name was never used in the show).
Trivia: Gilligan's Island was available on the planet Thermia in the sci-fi comedy movie Galaxy Quest.
Trivia: Every cast member appeared in every episode.
Answer: Bob Denver answered this when he was on a talk show hosted by Pat Sajak. He said they were going to write into an episode where the castaways found all these clothes, but it got too complicated, so he said, they decided, "who cares, it's only a TV show," and forgot about it. So the writers and actors even asked this, they just never bothered to address it.