The Kidnapper Gilligan's Island : Season 3 Episode 12

Someone kidnaps Mrs. Howell, Mary Ann, and Ginger, and then demands ransom money. The kidnaper turns out to be a compulsive gambler who fled civilization to avoid temptation. While the Castaways attempt to rehabilitate him, he ends up leaving the island, accompanied by Mrs. Howell's pearl necklace, Mr. Howell's wallet, and Ginger's earrings!