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)
