- Alexei Jawdokimov - Latvian Gangster
- Paul Tamarin - Latvian Gangster
- Izabella Telezynska - Latvian Gangster
- Mark Elwes - Birkenshaw
- Stanley Caine - GPO Special Delivery Boy
- Susan George - Russian Girl on Train
- Miki Iveria - Russian Woman on Train
- Jill Mai Meredith - Russian Girl on Train
- John Brandon - Jim
- Tony Harwood - Macey
- Michael Stayner - Scientist
- Donald Sutherland - Scientist at Computer
- George Roubicek - Edgar
- Brandon Brady - Chief of Security
- Fred Griffiths - Taxi Driver
- 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
- Reed De Rouen - Observer
- Frederick Schrecker - Old Man on Train
- Dolly Brennan - Old Woman in Gangster's Hut
- Bill Mitchell - Guard at Midwinter's House
- Max Kirby - Shoe Shop Assistant
- Steve Emerson - Russian Plainclothesman
- Mark Moss - Russian Plainclothesman
- Gertan Klauber - Dr. Kaarna (uncredited)
- Harry Fielder - Cowboy at Barndance (uncredited)
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Alex Wright
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Barry Barnholtz, John Dunning, Tom Reeve
Capítulo disponible en las siguientes plataformas:
