Jack Hart aka Quinn

Jack Holt

Acting

Julie Arnold

Constance Cummings

Acting

Jim Henderson

Boris Karloff

Acting

Arnold

Claude King

Acting

Nurse Edwards

Bertha Mann

Acting

Dr. August Steiner / Dr. Alec Munsell / Mr. X

Edward Van Sloan

Acting

Capt. E.J. Hawkes

Willard Robertson

Acting

Agent Burke

Thomas E. Jackson

Acting

Hotel Ansonia Maid

Martha Mattox

Acting

Eastland Hospital Nurse

Jessie Arnold

Acting

Man in Black / Henchman in Boat

Harry Tenbrook

Acting