Billion Dollar Brain

Michael Caine

Harry Palmer

George Roubicek

Edgar

Bill Mitchell

Guard at Midwinter's House

Vladek Sheybal

Dr. Eiwort

Guy Doleman

Colonel Ross

Milo Sperber

Basil

Gertan Klauber

Dr. Kaarna (uncredited)

Mark Elwes

Birkenshaw

Harry Fielder

Cowboy at Barndance (uncredited)

Ariel Levy

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Ken Russell

-

Alexei Jawdokimov

Latvian Gangster

Donald Sutherland

Scientist at Computer

Karl Malden

Leo Newbigen

Françoise Dorléac

Anya

John Brandon

Jim

Fred Griffiths

Taxi Driver

Paul Tamarin

Latvian Gangster

Jill Mai Meredith

Russian Girl on Train

Steve Emerson

Russian Plainclothesman

Reed De Rouen

Observer

Brandon Brady

Chief of Security

Oskar Homolka

General Stok

Izabella Telezynska

Latvian Gangster

Ed Begley

General Midwinter

Janos Kurutz

Latvian Gangster

Stanley Caine

GPO Special Delivery Boy

Susan George

Russian Girl on Train

Miki Iveria

Russian Woman on Train

Tony Harwood

Macey

Michael Stayner

Scientist

Gregg Palmer

1st Dutch Businessman

John Herrington

2nd Dutch Businessman

Hans De Vries

3rd Dutch Businessman

Alex Marchevsky

Russian Radar Operator

Peter Forest

2nd Russian Radar Operator

Frederick Schrecker

Old Man on Train

Dolly Brennan

Old Woman in Gangster's Hut

Max Kirby

Shoe Shop Assistant

Mark Moss

Russian Plainclothesman