Lyndon Brook

as Lt. Walsh (uncredited)

as Dr. Manx

as Silanus

as Carrington

as Cartney

as Begley

as Gillam

as Pugh

as Johnny Sanderson

as Diver Navigator, X2

as Doctor

as Dr. Barrister

as Robert Burton

as Richard Wagner

as Brian Carter

as Actor

as A.J. Balfour

as John Patterson

as Simon

as Stavrin

as Philip McDowell

as Louis Loisel

as Martin Eliot

as Mark

as Stephan

as Brother Edward

as Charles

as Lt. Col. Brant

as Alan Haynes

as Leslie Parrish

as Sir Arthur Harris

as Bit Role (uncredited)

as Paul Reston

as Philotas

as Victor Franklin

as Dr. Swanley

as Gerry Domford

as King George VI

as Dr. Ian Breck

as Narrator

as Philip Quarles