During the time the castaways were on the island, they were responsible for creating several events or mysteries featured over the radio to the general public who were unaware that the passengers of the S.S. Minnow were still alive. Many of these mysteries were caused by their efforts to get rescued and included but were not limited to:
- Alice McNeil's unidentified radio caller in Goodnight Sweet Skipper
- the mysterious whereabouts of Duke Williams during his absence in Big Man on a Little Stick
- the mysterious race of bird people in Mars in Smile, You're on Mars Camera
- the mysterious creators of the film that won the Cannes film festival in Castaways Pictures Presents
- the mysterious location of a rabbit's foot in the XR-1000 robot in Gilligan's Living Doll
- an unidentified man picked from the ocean who impersonated Mr. Howell in Will the Real Mr. Howell Please Stand Up?
- the mysterious cause of Jonathan Kincaid's break-down in The Hunter
- Sol Tobias's unidentified fans in Splashdown
- a mysterious UFO seen 250 miles south east of Hawaii in It's a Bird, It's a Plane, It's Gilligan
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