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

Joyce Carey

Miss Monley

David Daker

MI5 Man

Hermione Baddeley

Hetty

Patrick Barr

Gen. St. John

Yves Afonso

Jacques (uncredited)

Del Baker

Shadow (uncredited)

Robert Dorning

Jeweller (uncredited)

Jill Goldston

Commuter (uncredited)

Peter Halliday

Customs Officer (uncredited)