Michael Anderson Director Richard Todd Wing Commander Guy Gibson, V.C., D.S.O., D.F.C Actor Michael Redgrave Doctor B.N. Wallis, C.B.E, F.R.S. Actor Ursula Jeans Mrs. Wallis Actor Stanley Van Beers Sir David Pye, C.B., F.R.S. Actor Raymond Huntley Official, National Physical Laboratory Actor Hugh Manning Official, Ministry of Aircraft Production Actor Patrick Barr Captain Joseph "Mut" Summers, C.B.E. Actor Basil Sydney Air Chief Marshal Sir Arthur Harris G.C.B., O.B.E., A.F.C. Actor Ernest Clark Air Vice-Marshal The Hon. Ralph Cochrane G.B.E., K.C.B., A.F.C. Actor Derek Farr Group Captain J.N.H. Whitworth, D.S.O., D.F.C. Actor Laurence Naismith Farmer Actor Brewster Mason Flight Lieutenant R.D. Trevor-Roper, D.F.C., D.F.M. Actor Tony Doonan Flight Lieutenant R.E.G. Hutchison, D.F.C. Actor Nigel Stock Flying Officer F.M. Spafford, D.F.C., D.F.M. Actor George Baker Flight Lieutenant D.J.H. Maltby, D.S.O., D.F.C. Actor R.C. Sherriff Screenwriter W.A. Whittaker Producer Robert Clark Producer Leighton Lucas Original Music Erwin Hillier Cinematographer Richard Best Film Editing Robert Jones Art Director Robert Lennard Casting G.B. Walker Casting