Behind the Mask A Slinking Fiend ... Sulking Terror ... Mad Murder! A Secret Service agent nabs a scalpel-happy doctor who runs drugs in caskets. Details Casts Title Behind the Mask Release Date 1932-02-25 Runtime 01 Hours 08 Minutes Genres Crime Horror Thriller Production Companies Columbia Pictures Production Countries United States of America Jack Holt Jack Hart aka Quinn Constance Cummings Julie Arnold Boris Karloff Jim Henderson Claude King Arnold Bertha Mann Nurse Edwards Edward Van Sloan Dr. August Steiner / Dr.? Willard Robertson Capt. E.J. Hawkes Thomas E. Jackson Agent Burke Martha Mattox Hotel Ansonia Maid Jessie Arnold Eastland Hospital Nurse Harry Tenbrook Man in Black / Henchman ?