- Benjamin Carter Hett
- Â Self - Author, 'The Death of Democracy' 6 episodes, 2023
- Steven P. Remy
- Â Self - Editor, 'Adolf Hitler: A Reference Guide to His Life and Works' 6 episodes, 2023
- Timothy Snyder
- Â Self - Author, 'On Tyranny' 6 episodes, 2023
- Peter Longerich
- Â Self - Author, 'Hitler: A Biography' 6 episodes, 2023
- Anne Berg
- Â Self - Author, 'Empire of Rags and Bones' 6 episodes, 2023
- Heike B. Görtemaker
- Â Self - Author, 'Eva Braun: Life with Hitler' 5 episodes, 2023
- Rebecca Bennette
- Â Self - Author, 'Fighting for the Soul of Germany' 5 episodes, 2023
- Omer Bartov
- Â Self - Author, 'Anatomy of a Genocide' 4 episodes, 2023
- Lucia Heilman
- Â Self - Holocaust Survivor 4 episodes, 2023
- Nicole Eaton
- Â Self - Author, 'German Blood, Slavic Soil' 3 episodes, 2023
- Norbert Frei
- Â Self - Author, 'National Socialist Rule in Germany' 3 episodes, 2023
- Irene Butter
- Â Self - Holocaust Survivor 2 episodes, 2023
- Ron Rosenbaum
- Â Self - Author, 'Explaining Hitler' 2 episodes, 2023
- Karin Wieland
- Â Self - Author, 'Dietrich & Riefenstahl' 1 episode, 2023
- Silvia Bittencourt
- Â Self - Author, 'The Poison Kitchen: A Newspaper Against Hitler' 1 episode, 2023
- Benjamin Ferencz
- Â Self - Nuremberg Trials Prosecutor 1 episode, 2023
- Christian Rapp
- Â Self - Author, 'Hitler: The Formative Years' 1 episode, 2023
- Jonathan Bush
- Â Self - Nuremberg Trials Expert 1 episode, 2023
- Tamiko Toland
- Â Self - Daughter of John Toland 1 episode, 2023
- Susan Neiman
- Â Self - Author, 'Learning from the Germans' 1 episode, 2023
