Nicol Williamson

Maurice Castle

Richard Attenborough

Colonel John Daintry

Derek Jacobi

Arthur Davis

John Gielgud

Brigadier Tomlinson

Iman

Sarah

Joop Doderer

Cornelius Muller

Robert Morley

Doctor Percival

Ann Todd

Castle's Mother

Anthony Woodruff

Dr Barker

Keith Marsh

Porter

Gary Forbes

Sam

Angela Thorne

Lady Mary Hargreaves

Tony Haygarth

Buffy

Cyd Hayman

Cynthia

Paul Seed

Shop Assistant

Ken Jones

Messenger

Fiona Fullerton

Elizabeth

Tony Vogel

Matthew Connolly

Martin Benson

Boris

Adrienne Corri

Sylvia

Edward Dentith

Edward

Marianne Stone

Matron

Giles Watling

Colin

Frank Williams

Bellamy

Tom Chatto

Gen. Phillips

Sean Caffrey

Policeman

Clifford Earl

Ferguson

Sylvia Coleridge

Mrs Halliday

Denys Hawthorne

Insp. Butler

Glenna Forster-Jones

Black Prostitute

Morris Perry

Scientist

Richard Vernon

Sir John Hargreaves

Walter Hinds

Van Donck

Philip Chege

Black Man

Norbert Okare

Questioner

Vicky Udall

Castle's Secretary

Brian Epson

Judge

Leon Greene

Tall Man

Robert Dorning

Jameson

Patrick O'Connell

Reader

Raewyn Blade

Secretary

Boris Isarov

Agent

Paul Curran

Halliday

Chantal Gray

Stripper

Jill Goldston

NATO Lab Worker (uncredited)