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