3x14 - Gilligan's Island

A drab, plain-jane woman lands on the island seeking privacy. The girls give her a beauty make-over to lift her spirits, and she ends up looking like Ginger's twin. While the castaways were hoping to lift her spirits enough so that she would want to return to civilization (she has a boat, but has hidden the key), she ends up leaving them on the island and going back to Hollywood to attempt to assume Ginger Grant's movie career.