Chuck Zukowski
饰：Himself
布鲁斯·格林伍德
Bruce Greenwood
饰：Narrator
安东尼·门德斯
Anthony Mendez
饰：Antonio Zuleta
Grant Ross
饰：Police Officer
Brandon Alvis
饰：Himself
J.J. Sicotte
饰：Himself
斯蒂文·麦金托什
Steven Mackintosh
饰：Narrator
Richard F. Haines
饰：Self - Chief Scientist, Narcap
Jeffrey Meldrum
饰：Self - Professor of Anthropology, Idaho State University
Ken Gerhard
饰：Self - Cryptozoologist (segment: Mexican Chupacabra)
Chandra Wickramsinghe
饰：Self - Astrobiologist
Robert Salas
饰：Self
Dougal Jerram
饰：Self - Geologist
K. Anna I. Nekaris
饰：Self - Anthropologist
Michael Rudie
饰：Self
Rollin McCraty
饰：Self (segment: Life After Death)
Gary Green
Gary Green
饰：Oetsi
Deryck Broom
饰：Police Officer
Jeff Wamsley
饰：Self - Author, Mothman: The Facts Behind the Legend
Eduard Egarter Vigl
饰：Self - Otsi Conservation Team
Leslie Kean
饰：Self - Investigative Journalist
Stuart Chambers
Stuart Chambers
饰：Lighthouse Keeper 5
Sam Patrick
饰：Alan Godfrey
Pascale Neuschäfer
Charles I. Halt
饰：Self
Andrew Lambert
Andrew Lambert
饰：Self - Naval Historian
Renato Davila Riquelme
饰：Self - Museum Curator
Matthew Neal
饰：Donald McArthur
Abdi Hussein
饰：Boko Sorcerer
Rob Eadsforth
饰：Superintendant Robert Muirhead
Jonathan Briedenhann
饰：ATC
Rev. Bob Hill
饰：Self - Owner, Overtoun House (segment: Bridge of Death)
李·威廉姆斯
Lee Williams
饰：Narrator
Harry 'Doc' Kloor
饰：Self
Nick Pope
饰：Self - Ex British Ministry Of Defence
Semir Sam Osmanagich
饰：Self - Archaeologist
Monroe Nevels
饰：Self
查德·菲利普斯
Chad Phillips
饰：Dewitt
Andrew Germishuys
饰：Alien
Erika Simon
饰：Self
Anthony Bradshaw
饰：Steve Robey
Victor Grondel
饰：Emilio Estanol Lopez
Walter Leitner
饰：Self - University of Innsbruck
Faye Leport
饰：Self - Eyewitness
Randy S. Wymore
饰：Self - Pharmacologist
Tom Ury
饰：Self - Eyewitness
格雷格·克列克
Greg Kriek
饰：Sergei
Stephen Bassett
Stephen Bassett
饰：Self - Lobbyist
John Lear
饰：Self - Former CIA Pilot
Aubrey Shelton
Aubrey Shelton
饰：Marcelo Wayers
Troy Taylor
Troy Taylor
饰：Self - Author, The Devil Came to St Louis (segment: The Real Exorcist)
James Penniston
饰：Self
Henry Chapman
饰：Self - Archaeologist (segment: Bosnian Pyramid)
T.D. Barnes
饰：Self - Former Area 51 Operative
Vasily Yakemenko
饰：Self - Russian Academy of Security & Defence