- Josh Gates
- Â Self - Host, Adventurer & Explorer / ... 6 episodes, 2024-2025
- Sarah Bax Horton
- Â Self - Author 1 episode, 2024
- Alexander Puzrin
- Â Self - Professor of Geomechanics 1 episode, 2024
- Scott Dawson
- Â Self - Archaeological Researcher 1 episode, 2024
- David Oranchak
- Â Self - Software Developer 1 episode, 2024
- Joe Marino
- Â Self - Shroud of Turin Expert 1 episode, 2025
- Ben Hansen
- Â Self - UFO Researcher 1 episode, 2024
- Mark Horton
- Â Self - Archaeologist 1 episode, 2024
- Brandon Hodge
- Â Self - Historian 1 episode, 2025
- Peter Frick-Wright
- Â Self - Outside Magazine, Journalist 1 episode, 2024
- Steven Collins
- Â Self - Archaeologist 1 episode, 2024
- Van Smith
- Â Self - Investigative Journalist 1 episode, 2025
- Sami Jarroush
- Â Self - Historian 1 episode, 2024
- Roselyn A. Campbell
- Â Self - Bioarcheologist 1 episode, 2024
- David Nash
- Â Self - Professor of Physical Geography 1 episode, 2024
- Charlotte Lindqvist
- Â Self - Evolutionary Biologist 1 episode, 2024
- Sean Horlacher
- Â Self - Investigative Vlogger 1 episode, 2024
- Micheal Whelan
- Â Self - Investigative Journalist 1 episode, 2024
- Peter Speth
- Â Self - Forensic Pathologist 1 episode, 2024
- Marc Polymeropoulos
- Â MSNBC Contributor / ... 1 episode, 2024
- Alan Maxson
- Â Yeti (uncredited) 1 episode, 2024
- Jackie Green
- Â Tibetan Villager (uncredited) 1 episode, 2024
- Gloria Therese
- Â Tibetan Villager (uncredited) 1 episode, 2024
- Joseph Cathcart
- Â Travis Walton (uncredited) 1 episode, 2024
- Christopher Prinsloo
- Â Allen Dalis (uncredited) 1 episode, 2024
- Brian Sienkiewicz
- Â Jack The Ripper (uncredited) 1 episode, 2024
- Sean Haitz
- Â Reinhold Messner (uncredited) 1 episode, 2024
- Mike Concheso
- Â Max Headroom (uncredited) 1 episode, 2024
- Kevin Clarke
- Â Cameraman / ... (uncredited) 1 episode, 2024
- Jai Day
- Â Geoffroi de Charny (uncredited) 1 episode, 2025
- Danni Vitorino
- Â Knight (uncredited) 1 episode, 2025
- Thomas Plunkett
- Â Squire (uncredited) 1 episode, 2025
