Ray Milland

Wing Commander Rudge

Bernard Lee

Flight Sergeant Harris

Kenneth Haigh

Anthony 'Tony' Winchester

Kenneth Fortescue

John Fletcher

Sean Kelly

Cadet Day

Helen Cherry

Louise Dawson

Anthony Newley

Roger Endicott

Leslie Phillips

Blake

John Le Mesurier

Commandant

Richard Wattis

Wilson

Kynaston Reeves

Air Minister

Richard Bennett

Cadet Phillips

Jan Brooks

Diana

M.E. Clifton James

Field Marshal Montgomery (uncredited)