Erich von Stroheim
Le docteur Mathias Berthold
The Red Signal is a 1949 French drama film directed by Ernst Neubach and starring Erich von Stroheim, Denise Vernac and Frank Villard. It is based on a novel of the same title by Adolf Schütz and Paul Baudisch. It was shot at the Victorine Studios in Nice. The film's sets were designed by the art director Louis Le Barbenchon. imdb.com