Isle of the Dead

Boris Karloff character Gen. Nikolas Pherides
Ellen Drew character Thea
Marc Cramer character Oliver Davis
Katherine Emery character Mary St. Aubyn
Helene Thimig character Madame Kyra
Alan Napier character St. Aubyn
Jason Robards Sr. character Albrecht
Ernst Deutsch character Dr. Drossos
Skelton Knaggs character Andrew Robbins (uncredited)
Sherry Hall character Col. Kobestes (uncredited)
Erick Hanson character Officer (uncredited)
Rose Hobart character Mary St. Aubyn (in long shot; uncredited)