230.

Description: The story of how the British attacked German dams in World War II by using an ingenious technique to drop bombs where they would be most effective.

Cast:
Wing Commander Guy Gibson, V.C., D.S.O., D.F.C.: Richard Todd
Doctor B. N. Wallis, C.B.E., F.R.S.: Michael Redgrave
Mrs. Wallis: Ursula Jeans
Air Chief Marshal Sir Arthur Harris (now Marshal of the Royal Air Force) G.C.B., O.B.E., A.F.C.: Basil Sydney
Captain Joseph (Mutt) Summers, C.B.E.: Patrick Barr
Air Vice-Marshal The Hon. Ralph Cochrane (now Air Chief Marshal) G.B.E., K.C.B., A.F.C.: Ernest Clark
Group Captain J. N. H. Whitworth, D.S.O., D.F.C.: Derek Farr
Doctor: Charles Carson
Sir David Pye, C.B., F.R.S.: Stanley Van Beers
Doctor W. H. Glanville, C.B., C.B.E.: Colin Tapley
Committee Member: Walter Horsbrugh
Official, National Physical Laboratory: Raymond Huntley
Official, Ministry of Aircraft Production: Hugh Manning
Observer At Trials: Hugh Moxey
R.A.F. Officer At Trials: Anthony Shaw
Farmer: Laurence Naismith
Group Signals Officer: Harold Siddons
B.B.C. Announcer: Frank Phillips
Flt: Robert Shaw
Flying: Nigel Stock
Plt: Peter Assinder
Squadron Leader H. M. Young, D.F.C.: Richard Leech
Squadron Leader H. E. Maudslay, D.F.C.: Richard Thorp
Flight Lieutenant J. V. Hopgood, D.F.C.: John Fraser
Flight Lieutenant W. Astell, D.F.C.: David Morrell
Flight Lieutenant H. B. Martin, D.S.O., D.F.C., A.F.C. (now Wing Commander): Bill Kerr
Flight Lieutenant D. J. H. Maltby, D.S.O., D.F.C.: George Baker
Flight Lieutenant D. J. Shannon, D.S.O., D.F.C. (later Squadron Leader): Ronald Wilson
Flying Officer L. G. Knight, D.S.O.: Denys Graham
Flight Lieutenant R. C. Hay, D.F.C.: Basil Appleby
Flight Lieutenant J. F. Leggo, D.F.C.: Tim Turner
Flight Sergeant G. E. Powell: Ewen Solon
Wing Comdr. Gibson's Batman: Harold Goodwin
Adjutant to Air Vice-Marshal Cochrane: Peter Arne
Crew Member: Edward Cast
Batman: John Cazabon
RAF Officer: Edwin Richfield
Waiter in Officers' Mess: Philip Dale
Tail Gunner: Peter Diamond
Camera operator in testing tank: Elisabeth Gaunt
Mocking RAF Officer: Gerald Harper
RAF Pay Clerk In NAAFI: Arthur Howard
Attendant in Officers' Quarters: Patrick Jordan
Collins: Lloyd Lamble
Flight Sergeant: Philip Latham
Guard on Door: Patrick McGoohan
Waiter: Jack McNaughton
Adjutant to Air Chief Marshal Harris: Robert Moore
Assistant at Model Dam: Richard Neller
Barnes Wallis's Daughter: Nina Parry
RAF Officer in Mess Hall: Howard Pays
Bomber Crewman: Fred Stroud
Security Guard: Robert Brooks Turner

Written by: Paul Brickhill, Guy Gibson, R.C. Sherriff

Director: Michael Anderson

Production: Associated British Picture Corporation

Release date: 16 Jul 1955