Michael Caine
Maj. John Tarrant
Donald Pleasence
Cedric Harper
Delphine Seyrig
Ceil Burrows
Clive Revill
Alf Chestermann
John Vernon
McKee
Joss Ackland
Chief Supt. Wray
Janet Suzman
Alex Tarrant
Catherine Schell
Lady Melissa Julyan
Joseph O'Conor
Sir Edward Julyan
Denis Quilley
Bateson
Derek Newark
Monitoring Policeman
Edward Hardwicke
Mike McCarthy
Maureen Pryor
Jane Harper
Joyce Carey
Miss Monley
Preston Lockwood
Ilkeston
Molly Urquhart
Margaret
David Daker
MI5 Man
Hermione Baddeley
Hetty
Patrick Barr
Gen. St. John
Yves Afonso
Jacques (uncredited)
Del Baker
Shadow (uncredited)
Murray Brown
Doctor (uncredited)
Les Conrad
M15 Man (uncredited)
George Lane Cooper
Pincus (uncredited)
Brenda Cowling
Secretary (uncredited)
Robert Dorning
Jeweller (uncredited)
Roy Everson
M15 Man (uncredited)
Nancy Gabrielle
Manageress (uncredited)
Jill Goldston
Commuter (uncredited)
Charlie Gray
Tourist (uncredited)
Peter Halliday
Customs Officer (uncredited)