The story of the conception of a new British weapon for smashing the German dams in the Ruhr industrial complex and the execution of the raid by 617 Squadron 'The Dam Busters'.
Richard Todd
as Wing Commander Guy Gibson, V.C., D.S.O., D.F.C.
Michael Redgrave
as Doctor B. N. Wallis, C.B.E., F.R.S.
Ursula Jeans
as Mrs. Wallis
Basil Sydney
as Air Chief Marshal Sir Arthur Harris G.C.B., O.B.E., A.F.C.
Patrick Barr
as Captain Joseph (Mutt) Summers, C.B.E.
Ernest Clark
as Air Vice-Marshal The Hon. Ralph Cochrane G.B.E., K.C.B., A.F.C.
Derek Farr
as Group Captain J. N. H. Whitworth, D.S.O., D.F.C.
Charles Carson
as Doctor
Stanley Van Beers
as Sir David Pye, C.B., F.R.S.
Colin Tapley
as Doctor W.H. Glanville, C.B., C.B.E.
Frederick Leister
as Committee Member
Eric Messiter
as Committee Member
