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.
Wing Commander Roy Grant
Cliff Robertson
Lieutenant Erik Bergman
George Chakiris
Hilde Bergman
Maria Perschy
Air Vice-Marshal Davis
Harry Andrews
Group Captain Don Barrett
Donald Houston
Squadron Leader Frank Adams
Michael Goodliffe
Flight Lieutenant Gillibrand
John Meillon
Flight Lieutenant Scott
John Bonney
Flying Officer Hoppy Hopkinson
Angus Lennie
Flying Officer Bissell
Scot Finch
Flying Officer Evans
John Church
Rosie, barmaid at the Black Swan Inn
Barbara Archer
Lieutenant Nigel
Sean Kelly
Flight Lieutenant Singh
Julian Sherrier
Flight Lieutenant Frank
Geoffrey Frederick
Lieutenant Jones
Johnny Briggs
WAAF Sergeant Mary Blake / Bissell
Suzan Farmer
SS Interrogator
Anne Ridler
Lieutenant Maner (uncredited)
Peter Kriss
Ericson, Norwegian Resistance (uncredited)
Cavan Malone
Johanson, Norwegian Resistance (uncredited)
Richard Shaw