Behind the Mask

A Secret Service agent nabs a scalpel-happy doctor who runs drugs in caskets.

• John Francis DillonDirector
• Jo SwerlingWriter

• Jack HoltJack Hart aka Quinn
• Constance CummingsJulie Arnold
• Boris KarloffJim Henderson
• Claude KingArnold
• Bertha MannNurse Edwards
• Edward Van SloanDr. August Steiner / Dr. Alec Munsell / Mr. X
• Willard RobertsonCapt. E.J. Hawkes
• Thomas E. JacksonAgent Burke
• Martha MattoxHotel Ansonia Maid
• Jessie ArnoldEastland Hospital Nurse
• Harry TenbrookMan in Black / Henchman in Boat