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Versatile dialectitian Vito Scotti, cast as a misplaced WW2 Japanese solider during Season One of Gilligan's Island, makes a return visit to the island, this time in the role of mad scientist Dr. Boris Balinkoff (Vito Scotti). Promising to rescue the Castaways, Balinkoff transports them to his spooky old castle, where his sinister purpose is revealed: He plans to use our seven heroes and heroines for his experiments in personality-switching. Before long, everybody is speaking and acting like everyone else: The Professor (Russell Johnson) sounds like Mary Ann (Dawn Wells), Mary Ann sounds like the Skipper (Alan Hale Jr.), and worst of all, the mind and personality of the voluptuous Ginger (Tina Louise) has been switched with that of Balinkoff's brutish assistant Olaf (Mike Mazurki)!