- Linda Blair - Self - Actor
- Eileen Dietz - Self - Actor
- Barton Lane - Self - Radiologist
- Samuel Archer - Self
- Hector Avalos - Self - Professor of Religious Studies
- Tony Burke - Self - Professor of Religious Studies
- Richard Donner - Self - Director, The Omen
- Matt Gourley - Self - Podcaster
- Mace Neufeld - Self - Executive Producer, The Omen
- Dr. Michael Shermer - Self - Publisher, Skeptic Magazine
- Roger Deakins - Self
- Blanche Barton - Self
- Mitch Horowitz - Self - Author, Occult America
- Mitch Horowitz - Self
- Victoria Vetri - Self
- Dianne Lake - Self
- Adam Savage - Self
- Lorna Luft - Self
- Gregg Turkington - Self
- Arvo Iho - Self
- Andres Lõo - Self
- Bill Pullman - Self
- Cathy Tyson - Self
- Wade Davis - Self
- Jonathan Craven - Self
- David Ladd - Self
- Marianne Maddalena - Self
- David LeRoy Anderson - Self
- Ruggero Deodato - Self
- Francesca Ciardi - Self
- Luca Barbareschi - Self
- Carl Gabriel Yorke - Self
- Massimo Antonello Geleng - Self
- Sergio D'Offizi - Self
- Eduardo Sánchez - Self
- Roberta Findlay - Self
- Nick Pinkerton - Self
- Ryan Turek - Self
- Joe Rubin - Self
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