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.
Cliff Robertson
Wing Commander Roy Grant
George Chakiris
Lieutenant Erik Bergman
Maria Perschy
Hilde Bergman
Harry Andrews
Air Vice-Marshal Davis
Donald Houston
Group Captain Don Barrett
Michael Goodliffe
Squadron Leader Frank Adams
John Meillon
Flight Lieutenant Gillibrand
John Bonney
Flight Lieutenant Scott
