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Herman’s twin tries to swindle Lily out of her inheritance. Herman/Charlie: Fred Gwynne. Lily: Yvonne DeCarlo. Mrs. Cartwright: Jean Willes. Leo: Mike Mazurki. Grandpa: Al Lewis. Marilyn: Beverley Owen., Fred Gwynne plays a dual role in this episode as softhearted monstrosity Herman Munster and his glib-tongued twin brother Charlie. After years away from home, Charlie suddenly shows up at the Munster mansion, mesemerizing the family with his “sure-fire” scheme to create uranium from seawater. Taking into account Charlie’s reputation as a swindler, Herman smells a rat–and for once in his life, Herman is absolutely right!, Herman’s twin tries to swindle Lily out of her inheritance.
