Main Cast:
* Charles Laughton as Lionel Atwill
* Peter Finch as Philip Blake
* Margaret Rutherford as Penelope Blake
* Ronald Squire as Sir Charles Cartwright
* David Tomlinson as John Cartwright
* George Cole as Maurice
Supporting Cast:
* Brenda de Banzie as Mrs. Cartwright
* Miles Malleson as Mr. Price
* Frederick Valk as Dr. von Zimmer
* Maureen Connell as Jane Cartwright
* Joan Sims as Nurse
* Reginald Beckwith as Constable
* Victor Maddern as Chief Inspector
* John Le Mesurier as Detective Sergeant
It is important to note that this movie is a remake of the 1957 British comedy film "The Man Who Liked to Kill" which starred Nigel Bruce as Lionel Atwill.