"Drama set in an Italian prisoner of war camp during World War 2, where a group of British soldiers find their plans for escape thwarted by a mysterious traitor in their midst."
Richard Todd
as Lieutenant Colonel David Baird
Bernard Lee
as Lieutenant Colonel Huxley
Michael Wilding
as Major Charles Marquand
Peter Arne
as Capitano Benucci
Richard Attenborough
as Capt. 'Bunter' Phillips
Andrew Faulds
as Lt. Comdr. 'Dopey' Gibbon, R.N.
Donald Houston
as Capt. Roger Byfold
William Franklyn
as Capt. Tony Long
Vincent Ball
as Capt. Pat Foster
Peter Jones
as Capt. Alfred Piker
Ronnie Stevens
as Lt. Meynell, 'The Sewer Rat'
Terence Alexander
as Lt. Gibbs
Steve Norbert
as Lt. Pierre Dessin
Cyril Shaps
as Lt. Cyriakos Coutoules
Eric Lander
as Lt. Tim O'Brien
John Dearth
as Lt. Robson
Robert Bruce
as 'Doc' Simmonds, R.A.M.C.
Harold Siddons
as Capt. 'Tag' Burchnall
Ian Whittaker
as 2nd. Lt. Betts-Hanger
David Williams
as Lt. Parsons
David Graham
as Lt. Moxhay
Howard Williams
as Lt. Bush
Dino Galvani
as Commandante Arletti
John Adams
as German Officer (uncredited)
Victor Baring
as Lt Paoli (uncredited)
Paul Beradi
as Hut Commander (uncredited)
Ernest Blyth
Peter Brace
as POW (uncredited)
Michael Caine
as Prisoner with Pin-Up (uncredited)
John Corrie
Dan Cressey
as Italian Guard (uncredited)
Richard Duke
Max Faulkner
as POW in Hamlet (uncredited)
Otto Friese
Robert Gregory
Gerry Judge
John Leyton
Alf Mangan
Jim McManus
Pat Meehan
Patrick Mynhardt
Geremy Phillips
Pat Ryan
Harold Sanderson
Guy Standeven
Emile Stemmler
Phillip Stewart
Reg Thomason
Hedger Wallace
Ron Whitwell
Don Chaffey
Director
Frank Harvey
Screenplay
Michael Gilbert
Novel
Bryan Forbes
Arthur Grant
Director of Photography
John Trumper
Editor
George Stephenson
Sound Recordist
Robert Walker
Camera Operator
John Cox
Sound Supervisor
Bobbie Smith
Hairdresser
Philip Shipway
Location Manager
Ray Simm
Art Direction
Jack Verity
Wardrobe Supervisor
Freddie Williamson
Makeup Artist
Yvonne Richards
Continuity
Francis Chagrin
Original Music Composer
Ronald Spencer
Assistant Director
Red Law