Young doctor Garondet is summoned by renowned Professor Orloff. At Orloff's castle, Garondet discovers that the mad scientist has created an invisible yet murderous apeman.
Howard Vernon
as Professor Orloff
Brigitte Carva
as Cécile Orloff
Fernando Sancho
as The Game-Keeper
Paco Valladares
as Dr. Garondet
Eugène Berthier
as The Old Servant
Isabel del Río
as Marie
Arlette Balkis
as
May Chartrette
as
Christian Forges
as
Evane Hanska
as The Servant
