"A masked criminal who dresses like a giant bat terrorizes the guests at an old house rented by a mystery writer."
George Beranger
as Gideon Bell
Charles Herzinger
as Courleigh Fleming
Emily Fitzroy
as Cornelia Van Gorder
Louise Fazenda
as Lizzie Allen
Arthur Housman
as Richard Fleming
Robert McKim
as Dr. Wells
Jack Pickford
as Brooks Bailey
Jewel Carmen
as Dale Ogden
Sôjin Kamiyama
as Billy the Butler
Eddie Gribbon
as Detective Anderson
Tullio Carminati
as Detective Moletti
Lee Shumway
as The Unknown
Roland West
Director
Producer
Julien Josephson
Writer
Gregg Toland
Assistant Camera
Mary Roberts Rinehart
Theatre Play
Avery Hopwood
Arthur Edeson
Director of Photography
George Marion Jr.
William Cameron Menzies
Art Direction
Hal C. Kern
Editor
