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)