- Ben Macintyre
- Self - Presenter and Author of 'Double Cross'
- Tuppence Middleton
- Treasure's Voice
- Hugh Astor
- Self - MI5 Case Officer, 1941-45 - 1993 Interview
- Thomas Argyll Robertson
- Self - Double-Cross (XX) Campaign - 1984 Interview
- Lady Dundas
- Self - Junior Commander, ATS, 1943-46
- Prue Evill
- Self - Niece of Mary Sherer
- Roman Czerniawski
- Self - Double Agent - 1984 Interview
- Gerry Czerniawski
- Self - Son of Roman Czerniawski
- Dwight D. Eisenhower
- Self - Supreme Commander, Allied Force
- Mark Seaman
- Self - Historian
- Dusko Popov
- Self - Double Agent
- Marco Popov
- Self - Son of Dusko Popov
- Juan Pujo GarcÃa
- Self - Double Agent 'Garbo'
- Winston Churchill
- Self - Prime Minister of the United Kingdom
- Joseph Goebbels
- Self - Reichsminister of Public Enlightenment and Propaganda
- Hermann Göring
- Self - Chief of the Luftwaffe High Command
- Adolf Hitler
- Self - Führer of Germany
- George S. Patton
- Self - U.S. General
- Franklin D. Roosevelt
- Self - President of the United States
- Joseph Stalin
- Self - General Secretary of the Communist Party of the Soviet Union
