
When Norwegian resistance leader Lieutenant Erik Bergman reports the location of a German V-2 rocket fuel plant, the Royal Air Force's 633 Squadron is assigned the mission to destroy it. The plant is in a seemingly-impregnable location beneath an overhanging cliff at the end of a long, narrow fjord lined with anti-aircraft guns. The only way to destroy the plant is by collapsing the cliff on top of it.

as Wing Commander Roy Grant

as Lieutenant Erik Bergman

as Hilde Bergman

as Air Vice-Marshal Davis

as Group Captain Don Barrett

as Squadron Leader Frank Adams

as Flight Lieutenant Gillibrand

as Flight Lieutenant Scott

as Flying Officer Hoppy Hopkinson

as Flying Officer Bissell

as Flying Officer Evans

as Rosie, barmaid at the Black Swan Inn

as Lieutenant Nigel

as Flight Lieutenant Singh

as Flight Lieutenant Frank

as Lieutenant Jones

as WAAF Sergeant Mary Blake / Bissell

as SS Interrogator

as Lieutenant Maner (uncredited)

as Ericson, Norwegian Resistance (uncredited)

as Johanson, Norwegian Resistance (uncredited)