Cast
James Burke
Sgt. Velle
Marsha Hunt
Barbara Braun
Ann Shoemaker
Lydia Braun
Marion Martin
Cornelia
Katherine DeMille
Valerie Norris
Alan Ladd
Elevator Passenger (uncredited) (unconfirmed)
Ralph Bellamy
Ellery Queen
Fred Niblo
John Braun
Douglas Fowley
Rocky Taylor
Frank O'Connor
Ambulance Driver (uncredited)
Charley Grapewin
Insp. Queen
Michael Whalen
Dr. James Rogers
Morgan Wallace
Zachary
Margaret Lindsay
Nikki Porter
Charles Lane
Dr. Prouty
Byron Foulger
Amos
Jack Cheatham
Desk Sergeant (uncredited)
Lee Phelps
Flynn (uncredited)
Jack Rice
Rogers' Assistant (uncredited)