Episode Title:The Missing Heir.Episode Description:Benny is a double for the missing heir to a millionaire's fortune; Top Cat and the gang get Benny to the mansion in time to claim the money, but this is bad news to the scheming butler Chutney (voice by Paul Frees) and dog Griswald (voiced by Don Messick) who hoped to claim the fortune for themselves. John Stephenson provides the voice of the Old Man, while Jean Vander Pyl does the voice of the girl cat, however, it isn't known who does the voice of the Taxi Cab Driver. This episode marks the first appearance of Griswald.