Bela Lugosi
Armand Tesla
Bela Lugosi
Armand Tesla
Nina Foch
Nicki Saunders
Roland Varno
John Ainsley
Matt Willis
Andreas Obry
Frieda Inescort
Lady Jane Ainsley
Miles Mander
Sir Frederick Fleet
Ottola Nesmith
Elsa Walter - Governess
Gilbert Emery
Dr. Walter Saunders
Leslie Denison
Detective Lynch
William Austin
Detective Gannett
Jeanne Bates
Miss Northcutt (uncredited)
Billy Bevan
Horace (uncredited)
Olaf Hytten
Ben (uncredited)
Kurt Neumann
Story
Griffin Jay
Writer
Randall Faye
Additional Dialogue
Sam White
Producer
Lew Landers
Director
L. William O'Connell
Director of Photography
Paul Borofsky
Editor
John Stumar
Director of Photography
Mario Castelnuovo-Tedesco
Original Music Composer