- James Pool
- Â Self - Author of 'Who Financed Hitler' 4 episodes, 2020
- Guy Walters
- Â Self - Author, Historian & Journalist 4 episodes, 2020
- Frank McDonough
- Â Self - Historian of the Third Reich 4 episodes, 2020
- Christopher Kopper
- Â Self - Author & Historian 4 episodes, 2020
- Richard Lintern
- Â Self - Narrator 4 episodes, 2020
- David Wills
- Â Self - Narrator 4 episodes, 2020
- Dominick Eisenschmidt
- Â Self - Additional Narrator 4 episodes, 2020
- Tadeas Reznicek
- Â Hitler 4 episodes, 2020
- Bradley W. Hart
- Â Self - Associate Professor, California State University 3 episodes, 2020
- Isabel Vincent
- Â Self - Investigative Journalist 3 episodes, 2020
- Martin Dean
- Â Self - Research Scholar, Center for Advanced Holocaust Studies 3 episodes, 2020
- Michael Thad Allen
- Â Self - Author of 'The Business of Genocide' 2 episodes, 2020