Richard Todd

Wing Commander Guy Gibson, V.C., D.S.O., D.F.C.

Michael Redgrave

Doctor B. N. Wallis, C.B.E., F.R.S.

Ursula Jeans

Mrs. Wallis

Basil Sydney

Air Chief Marshal Sir Arthur Harris G.C.B., O.B.E., A.F.C.

Patrick Barr

Captain Joseph (Mutt) Summers, C.B.E.

Ernest Clark

Air Vice-Marshal The Hon. Ralph Cochrane G.B.E., K.C.B., A.F.C.

Derek Farr

Group Captain J. N. H. Whitworth, D.S.O., D.F.C.

Charles Carson

Doctor

Stanley Van Beers

Sir David Pye, C.B., F.R.S.

Colin Tapley

Doctor W.H. Glanville, C.B., C.B.E.

Frederick Leister

Committee Member

Raymond Huntley

Official, National Physical Laboratory

Hugh Manning

Official, Ministry of Aircraft Production

Edwin Styles

Observer at Trials

Laurence Naismith

Farmer

Nigel Stock

Flying / Off. F. M. Spafford, D.F.C., D.F.M.

Brian Nissen

Flt / Lt. A. T. Taerum, D.F.C.

Robert Shaw

Flt / Sgt. J. Pulford, D.F.M.

Richard Leech

Squadron Leader H. M. Young, D.F.C.

Richard Thorp

Squadron Leader H. E. Maudslay, D.F.C.

John Fraser

Flight Lieutenant J. V. Hopgood, D.F.C.

Bill Kerr

Flight Lieutenant H. B. Martin, D.S.O., D.F.C., A.F.C.

George Baker

Flight Lieutenant D. J. H. Maltby, D.S.O., D.F.C.

Tim Turner

Flight Lieutenant J. F. Leggo, D.F.C.

Ewen Solon

Flight Sergeant G. E. Powell

Harold Goodwin

Wing Comdr. Gibson's Batman

Patrick McGoohan

Guard at door (uncredited)

Peter Arne

Staff Officer to Air-Vice Marshal Cochrane (uncredited)

Brenda De Banzie

Waitress (uncredited)

Peter Diamond

Tail Gunner (uncredited)

Gerald Harper

RAF Officer (uncredited)

Arthur Howard

RAF Pay Clerk in NAAFI (uncredited)

Lloyd Lamble

Collins (uncredited)

Philip Latham

Flight Sergeant (uncredited)

Edwin Richfield

RAF Officer (uncredited)