Obsada:

• Lionel Atwill Dr. Jerry Xavier
• Fay Wray Joanne 'Joan' Xavier
• Lee Tracy Daily World Reporter Lee Taylor
• Preston Foster Dr. Wells - Academy of Surgical Research
• John Wray Academy of Surgical Research Dr. Haines
• Harry Beresford Academy of Surgical Research Dr. Duke
• Arthur Edmund Carewe Academy of Surgical Research Dr. Rowitz
• Leila Bennett Xavier's Maid Mamie
• Robert Warwick Police Commissioner Stevens
• George Rosener Dr. X's Butler Otto
• Willard Robertson Detective O'Halloran
• Thomas E. Jackson Daily World Editor
• Harry Holman Waterfront Policeman Mike
• Mae Busch Cathouse Madame
• Tom Dugan Sheriff
• Raoul Freeman Morgue Detective
• Selmer Jackson Daily World Night Editor Willard Keefe
• Charles McMurphy Detective At Headquarters
• Ky Robinson Morgue Detective