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