Behind the Mask (1932 film)

Behind the Mask is a 1932 American pre-Code crime/horror film directed by John Francis Dillon and starring Jack Holt, Boris Karloff and Edward Van Sloan.

Plot
A federal agent (Holt) goes undercover to infiltrate a drug smuggling operation headed by a mysterious Mr. X (Van Sloan), a criminal mastermind whose identity is unknown even to his henchmen. Mr. X is also running a bogus hospital where victims are killed on the operating table, and their coffins stuffed with narcotics. The drug-filled coffins are then buried in a cemetery.

Cast

 * Jack Holt as Jack Hart aka Quinn
 * Constance Cummings as Julie Arnold
 * Boris Karloff as Jim Henderson
 * Claude King as Arnold
 * Bertha Mann as Nurse Edwards
 * Edward Van Sloan as Dr. August Steiner / Dr. Alec Munsell / Mr. X
 * Willard Robertson as Capt. E.J. Hawkes
 * Thomas E. Jackson as Agent Burke (as Tommy Jackson)