Set in German-occupied Norway, resistance fighter Knut Straud enlists the reluctant physicist Rolf Pedersen in an effort to destroy the German heavy water production plant in rural Telemark.
Dr. Rolf Pedersen
Knut Straud
Anna Pedersen
Uncle
Arne
Major Frick
Terboven
Col. Wilkinson
Sigrid
Jensen
Professor Logan
Nilssen
General Bolt
Doctor
Knippelberg
General Courts
Gunnar
Freddy
Oli
Henrik
Claus
Einar
Captain of "Galtesund"
Hartmuller
Woman on Bus
Mrs. Sandersen
Erhardt
German Sergeant
Businessman
Sturmfuhrer
Mr. Sandersen
Watchman in Factory
Girl Student (uncredited)
