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Everyone falls under suspicion when Mrs. Howell's diamond brooch disappears. What no one realizes--at least not at first--is that the "thief" is actually a gorilla (played by famed stuntman and animal imitator Janos Prohaska), who tips his hand by kidnapping Mrs. Howell (Natalie Schafter). Turns out that the big ape is actually attracted to Mrs. Howell's perfume, which Gilligan (Bob Denver) soon learns to his dismay when he himself is drenched in the aromatic liquid.