Harry Palmer
Leo Newbigen
General Midwinter
General Stok
Anya
Colonel Ross
Dr. Eiwort
Basil
Latvian Gangster
Birkenshaw
GPO Special Delivery Boy
Russian Girl on Train
Russian Woman on Train
Jim
Macey
Scientist
A former British spy stumbles into in a plot to overthrow Communism with the help of a supercomputer. But who is working for whom?