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.
Kirk Douglas
Dr. Rolf Pedersen
Richard Harris
Knut Straud
Ulla Jacobsson
Anna Pedersen
Michael Redgrave
Uncle
David Weston
Arne
Anton Diffring
Major Frick
Eric Porter
Terboven
Mervyn Johns
Col. Wilkinson
