- Tim Cook
- Â Self - Historian, Canadian War Museum 2 episodes, 2018
- Mat McLachlan
- Â Self - Battlefield Historian 2 episodes, 2018
- Patrick Watt
- Â Self - Curator, National Museum Scotland 2 episodes, 2018
- Elaine McFarland
- Â Self - Great War Historian 2 episodes, 2018
- Bruce Scates
- Â Self - Historian, Canadian National University 2 episodes, 2018
- Peter Stanley
- Â Self - Historian, University of NSW Canberra 2 episodes, 2018
- Shane Schreiber
- Â Self - Retired Lt. Colonel and Historian 2 episodes, 2018
- Margaret MacMillan
- Â Self - Historian, Oxford University 2 episodes, 2018
- Jamie Lee
- Â Self - Narrator 2 episodes, 2018
- Malcolm Taylor
- Â Field Marshal Douglas Haig 2 episodes, 2018
- Ben Mortley
- Â General John Monash 2 episodes, 2018
- Denis Lamonde
- Â Marshal Ferdinand Foch 2 episodes, 2018
- Bruce Turner
- Â General Arthur Currie 2 episodes, 2018
- Brian Scott Carleton
- Â General Henry Rawlinson 1 episode, 2018
- Ralph MacLeod
- Â General Julian Byng 1 episode, 2018
- Nick Biskupek
- Â Lt. David Cameron (uncredited) 2 episodes, 2018
- Isaiah Kolundzic
- Â Canadian Artillery Officer (uncredited) 2 episodes, 2018
- James William Dolby
- Â Canadian Soldier #1 (uncredited) 2 episodes, 2018
- Eric Frank
- Â Canadian Soldier #2 (uncredited) 2 episodes, 2018
- Will Attwood
- Â Scottish Soldier #1 (uncredited) 2 episodes, 2018
- Garrett Mallory Scott
- Â Scottish Soldier #3 (uncredited) 2 episodes, 2018
- Charles Gordon
- Â Georges Clemenceau (uncredited) 2 episodes, 2018
- Hew Strachan
- Â Self - Historian, University of St. Andrews 1 episode, 2018
- Gord Mackenzie
- Â General Henry Horne 1 episode, 2018
- Steven Vlahos
- Â Sunny Jim (uncredited) 2 episodes, 2018
- Bradley C. Miller
- Â Scottish Soldier #2 (uncredited) 2 episodes, 2018
- Will Allen
- Â James Ray Lewis (uncredited) 2 episodes, 2018
- Craig Cyr
- Â John Denner (uncredited) 1 episode, 2018
- Michael MacEachern
- Â Scottish Signaler (uncredited) 1 episode, 2018
- Connor Meek
- Â Captain Frederick Banting (uncredited) 1 episode, 2018