A former British spy stumbles into in a plot to overthrow Communism with the help of a supercomputer. But who is working for whom?
Michael Caine
Harry Palmer
Karl Malden
Leo Newbigen
Ed Begley
General Midwinter
Oskar Homolka
General Stok
Françoise Dorléac
Anya
Guy Doleman
Colonel Ross
Vladek Sheybal
Dr. Eiwort
Milo Sperber
Basil
Janos Kurutz
Latvian Gangster
Alexei Jawdokimov
Paul Tamarin
Izabella Telezynska
Mark Elwes
Birkenshaw
Stanley Caine
GPO Special Delivery Boy
Susan George
Russian Girl on Train