- Curtis Roosevelt
- Â Self - Grandson of President Franklin Roosevelt 2 episodes
- François Kersaudy
- Â Self - Historian, Second World War Expert 2 episodes
- André Kaspi
- Â Self - US Historian 2 episodes
- Robert Franck
- Â Self - Historian, Expert on Europe and International Relations 2 episodes
- Yuri Borko
- Â Self - Historian and Political Analyst, Expert on Europe 2 episodes
- Igor Prelin
- Â Self - Former KGB Agent and Spokesman 2 episodes
- Stanislas Jeannesson
- Â Self - Historian, Cold War Expert 2 episodes
- Sabine Dullin
- Â Self - Historian, Expert on Russia and Eastern Europe 2 episodes
- Justine Faure
- Â Self - Historian, Eastern Europe Expert 2 episodes
- Patricia Pierangeli
- Â Narrator 2 episodes
- Clifton Truman Daniel
- Â Self - Harry Truman's Grandson 1 episode
- Peter Montagnon
- Â Self - Former MI6 Agent 1 episode
