- David Stahel
- Â Self - Senior Lecturer, University of New South Wales 6 episodes, 2021
- Geoffrey Wawro
- Â Self - Director of the Military History Center, University of North Texas 6 episodes, 2021
- Lloyd Clark
- Â Self - Director of Humanities Research Institute, University of Buckingham 6 episodes, 2021
- Rod Mullinar
- Â Self - Narrator 6 episodes, 2021
- Victoria Taylor
- Â Self - PhD History Researcher, University of Hull 4 episodes, 2021
- Colin Garnett
- Â Self - Historical Consultant 3 episodes, 2021
- Norman Ohler
- Â Self - Author, 'Blitzed: Drugs in Nazi Germany' 2 episodes, 2021
- Robert M. Kaplan
- Â Self - Forensic Psychiatrist 2 episodes, 2021
- Rhiannon Neilson
- Â Self - Scientia Doctoral Researcher, University of New South Wales 1 episode, 2021
