John Mills as Captain Anson

Sylvia Syms as Sister Diana Murdoch

Anthony Quayle as Captain van der Poel

Harry Andrews as M.S.M. Pugh

Diane Clare as Sister Denise Norton

Richard Leech as Captain Crosbie

Liam Redmond as Brigadier (D.D.M.S.)

Allan Cuthbertson as Brigadier's Staff Officer

David Lodge as C.M.P Captain (Tank Trap)

Michael Nightingale as C.M.P Captain (Check Point)

Basil Hoskins as C.M.P Lieutenant (Alexandria)

Walter Gotell as 1st German Officer

Richard Marner as German Guard

Peter Arne as British Officer at Oasis

Paul Stassino as Barman

Frederick Jaeger as 2nd German Officer