After socialite Lynn Llewellyn receives an anonymous threat, he is poisoned at his uncle's casino, and although he recovers, his wife is murdered by the same killer.
Philo Vance
Priscilla Kinkaid Llewellyn
Lynn Llewellyn
Doris Reed
Richard Kinkaid
Police Sergeant Ernest Heath
Currie
Amelia Llewellyn
Becky
District Attorney John Markham (as Purnell B. Pratt)
Dr. Kane
Virginia Llewellyn
Smith (as Leo Carroll)
Dr. Doremus
Husband of Fat Lady at Auction (uncredited)
Casino Patron (uncredited)
Nurse to Lynn (uncredited)
Waiter (unconfirmed) (uncredited)
Dr. Elton (uncredited)
Auctioneer (uncredited)
Auction Floorman (uncredited)
Mrs. Marting (uncredited)
Watchman (uncredited)
Police Detective (unconfirmed) (uncredited)
Fat Lady at Auction (uncredited)
Reporter (uncredited)
Reporter (uncredited)
Taki - Casino Pageboy (uncredited)
Roulette Croupier (uncredited)
Casino Patron (uncredited)
Japanese Casino Waiter (uncredited)
Photographer (uncredited)
Assistant Coroner (uncredited)
Police Detective (uncredited)
