Prof. George Kingsley / Red Cannon
Stanley Ridges
Dr. Ernest Sovac
Boris Karloff
Louis Devore
Raymond Bailey
Chief of Police
Joe King
Taxi Driver
John Kelly
Nurse
Jessie Arnold
2nd Nurse
Elfriede Borodin
Student
Tommy Conlon
Club Maitre d' (uncredited)
Franco Corsaro
Reporter Ernst Gives Notes To
James Craig
Detective
Kernan Cripps
Det. Farnow
Eddie Dunn
Eric Marnay
Bela Lugosi
Edward Earle
Prison Doctor
Harry Hayden
Fat Man in Bar
Frank Jaquet
Midtown Hotel Maid
Ellen Lowe
Midtown Hotel Clerk
Jerry Marlowe
Cabbie
Wallace Reid Jr.
G-Man
William Ruhl
Prison Chaplain
Frank Sheridan
Dr. Warner
Edwin Stanley
Sunny Rogers
Anne Nagel
Harry Tenbrook
Det. Carpenter
Emmett Vogan
Russell Wade
Dave Willock
Victor Zimmerman
Hotel Associate
Robert Morgan
Jean Sovac
Anne Gwynne
Mrs. Margaret Kingsley
Virginia Brissac
Frank Miller
Edmund MacDonald
William Kane
Paul Fix
Bellhop
Murray Alper
Bartender
Jack Mulhall
Original Music Composer
Frank Skinner
Director
Arthur Lubin
Makeup Artist
Jack Pierce
Director of Photography
Elwood Bredell
Screenplay
Curt Siodmak
Eric Taylor
Editor
Philip Cahn
Associate Producer
Burt Kelly
Art Direction
Jack Otterson
Costume Design
Vera West
Sound
Charles Carroll
Music Director
Hans J. Salter