The biggest plot hole in the series was the missing explanation of why these characters (other than the Skipper and Gilligan) would be on the boat for this rinky-dink 3-hour tour in the first place. Mary Ann could possibly be seen as a tourist taking the tour but why would Ginger, budding starlet, even be down at the docks. The professor can't reasonably seen as taking the time out of his research and studies for this 'cruise'. Finally, The Howells are reputed to be two of the richest people in the world. They would have had their own superyacht and that would not have been in a sloop anywhere near the Minnow.
Review of Gilligan's Island
