Jack Holt
Jack Hart aka Quinn
Acting
Constance Cummings
Julie Arnold
Acting
Boris Karloff
Jim Henderson
Acting
Claude King
Arnold
Acting
Bertha Mann
Nurse Edwards
Acting
Edward Van Sloan
Dr. August Steiner / Dr. Alec Munsell / Mr. X
Acting
Willard Robertson
Capt. E.J. Hawkes
Acting
Thomas E. Jackson
Agent Burke
Acting
Martha Mattox
Hotel Ansonia Maid
Acting
Jessie Arnold
Eastland Hospital Nurse
Acting
Harry Tenbrook
Man in Black / Henchman in Boat
Acting