Gilbert Green was not credited as a guest star, even though he has more lines and screen time than guest stars Albert Paulsen and Sally Gracie.
French title: "Chantage," which means 'blackmail'.
This is the only appearance Frank Gorshin makes in the series. He is perhaps best remembered for his iconic role as the Riddler in the TV series Batman (1966) and the companion theatrical release of Batman: The Movie (1966).
This is one of the few times in Elizabeth MacRae's TV acting career wherein she was able to jettison her heavy southern accent and employ the voice skills Otto Preminger had encouraged her to train for.
This is the only appearance Elizabeth MacRae, who plays Bunny Colton, makes in the series. She is perhaps best known for her recurring role as Gomer Pyle's girlfriend Lou-Ann in Gomer Pyle: USMC (1964).