A doctor's research into the roots of evil turns him into a hideous depraved fiend.

John Barrymoreas Dr. Henry Jekyll / Mr. Edward Hyde
Brandon Hurstas Sir George Carewe
Martha Mansfieldas Millicent Carewe
Charles Laneas Dr. Richard Lanyon
Nita Naldias Miss Gina
Louis Wolheimas Music Hall Proprietor
Ferdinand Gottschalkas Old Man at Table in Music Hall (uncredited)