

"S.S. Van Dine's Greatest Philo Vance Mystery!"
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)