Gilligan's Island (1964)

S03E12 The Kidnapper

Mrs. Howell, Mary Ann, and Ginger are kidnapped, with their captor demanding a ransom. It’s revealed that the kidnapper is a compulsive gambler who escaped society to evade his addiction. As the Castaways try to help him turn his life around, he ultimately decides to leave the island, taking with him Mrs. Howell's pearl necklace, Mr. Howell's wallet, and Ginger's earrings!