Leif Tronstad assembles a sabotage group named Grouse. The aim is to assist the English commandos to blow up the water plant at Vemork. In Germany, Werner Heisenberg continues his work on the atomic reactor. Grouse is dropped over Hardangervidda and prepare a landing for the Englishmen.

• Kristian Eidnes Andersen
• Petter Rosenlund
• Per-Olav Sørensen

• Corey Johnson
• Pip Torrens
• Anna Friel