God help us if they rise again!

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.

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Main Cast: Howard Vernon, Brigitte Carva, Fernando Sancho, Paco Valladares, Eugène Berthier, Isabel del Río, Arlette Balkis, May Chartrette, Christian Forges, Evane Hanska

Director: Pierre Chevalier

Writers: Juan Fortuny, Pierre Chevalier, Pierre Chevalier

Editors: Albert Gasset Nicolau, Fernande Pineau

Cinematographers: Raymond Heil, Juan Fortuny

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