Maj. John Tarrant

Michael Caine

Acting

Cedric Harper

Donald Pleasence

Acting

Ceil Burrows

Delphine Seyrig

Acting

Alf Chestermann

Clive Revill

Acting

McKee

John Vernon

Acting

Chief Supt. Wray

Joss Ackland

Acting

Alex Tarrant

Janet Suzman

Acting

Lady Melissa Julyan

Catherine Schell

Acting

Sir Edward Julyan

Joseph O'Conor

Acting

Bateson

Denis Quilley

Acting

Monitoring Policeman

Derek Newark

Acting

Mike McCarthy

Edward Hardwicke

Acting

Jane Harper

Maureen Pryor

Acting

Miss Monley

Joyce Carey

Acting

Ilkeston

Preston Lockwood

Acting

Margaret

Molly Urquhart

Acting

MI5 Man

David Daker

Acting

Hetty

Hermione Baddeley

Acting

Gen. St. John

Patrick Barr

Acting

Jacques (uncredited)

Yves Afonso

Acting

Shadow (uncredited)

Del Baker

Crew

Doctor (uncredited)

Murray Brown

Acting

M15 Man (uncredited)

Les Conrad

Acting

Pincus (uncredited)

George Lane Cooper

Acting

Secretary (uncredited)

Brenda Cowling

Acting

Jeweller (uncredited)

Robert Dorning

Acting

M15 Man (uncredited)

Roy Everson

Acting

Manageress (uncredited)

Nancy Gabrielle

Acting

Commuter (uncredited)

Jill Goldston

Acting

Tourist (uncredited)

Charlie Gray

Acting

Customs Officer (uncredited)

Peter Halliday

Acting