Calificación
Reparto

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. Alec Munsell / Mr. X

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 in Boat