The UnXplained Mysteries of the Underground (Season 7, Episode 18)
TV-PG
TV Episode | 42 min | Documentary

Primary photo for Mysteries of the Underground

The UnXplained

Mysteries of the Underground (Season 7, Episode 18)

TV-PG

TV Episode | 42 min | Documentary

Beneath our feet lie hidden ancient tunnels, sacred caves, and shadowy passages into a world of darkness shaped by nature, carved by man, and steeped in myth. Are these underground realms mere remnants of the past?

Director

Rob O'Brien (host wraps)

Writers

Brian Coughlin | Evan Goldstein | Brian Leff

Producer

Eric Murphy (producer)

Cinematographer

Anghel Decca (director of photography: host wraps)

Editors

Lara Andre (senior editor) | Kevin Browne | Ken Esbenshade | Nicholas Siapkaris (as Nick Siapkaris) & 3 more

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Edit Released

Updated Oct 31, 2025

Release date

Oct 31, 2025 (United States)

Contacts

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Cast	+ Add Cast
17 cast members

Name	Known for
William Shatner Self - Host Self - Host See fewer	Star Trek V: The Final Frontier (1989)
Jill Heinerth Self - Underwater Explorer Self - Underwater Explorer See fewer	The Cave (2005)
Lewis Land Self - Geologist (as Lewis Land Ph.D.) Self - Geologist (as Lewis Land Ph.D.) See fewer	The UnXplained (2019)
Ho Khanh Self - Discovered Son Doong Cave Self - Discovered Son Doong Cave See fewer	The UnXplained (2019)
Howard Limbert Self - Cave Explorer Self - Cave Explorer See fewer	The UnXplained (2019)
Ben McGee Self - Planetary Geoscientist: University of Maryland Self - Planetary Geoscientist: University of Maryland See fewer	Black Files Declassified (2020)
Molly Schroer Self - Park Ranger: Mommoth Cave National Park Self - Park Ranger: Mommoth Cave National Park See fewer	The UnXplained (2019)
Patricia Kambesis Self - Professor of Geography:Western Kentucky University (as Pat Kambesis Ph.D.) Self - Professor of Geography:Western Kentucky University (as Pat Kambesis Ph.D.) See fewer	Expedition X (2020)
Lynne S. McNeill Self - Assoc. Prof. of Folklore: Utah State University (as Lynne McNeill Ph.D.) Self - Assoc. Prof. of Folklore: Utah State University (as Lynne McNeill Ph.D.) See fewer	Paranormal Caught on Camera (2019)
George Crothers Self - Anthropologist & Researcher (as George Crothers Ph.D.) Self - Anthropologist & Researcher (as George Crothers Ph.D.) See fewer	The UnXplained (2019)
Jonathan Dover Self - Retired Navajo Ranger Lieutenant (as Jonathan Redbird Dover) Self - Retired Navajo Ranger Lieutenant (as Jonathan Redbird Dover) See fewer	Alien Highway (2019)
Bradley Russell Self - Professor of Anthropology: University of Albany (as Bradley Russell Ph.D.) Self - Professor of Anthropology: University of Albany (as Bradley Russell Ph.D.) See fewer	The UnXplained (2019)
Ashley Darkwood Self - Paranormal Investigator Self - Paranormal Investigator See fewer	Fighting with My Family (2019)
Tony McMahon Self - Historian Self - Historian See fewer	The UnXplained (2019)
Francis Dashwood Self - 12th Baronet: Dashwood Descendant (as Sir Edward John Francis Dashwood) Self - 12th Baronet: Dashwood Descendant (as Sir Edward John Francis Dashwood) See fewer	The UnXplained (2019)
Sharon Gerstel Self - Prof. of Byzantine Art & Archaeology: UCLA (as Sharon Gerstel Ph.D.) Self - Prof. of Byzantine Art & Archaeology: UCLA (as Sharon Gerstel Ph.D.) See fewer	The UnXplained (2019)
Garrett Ryan Self - Author, Naked Statues, Fat Gladiators, and War Elephants (as Garrett Ryan Ph.D.) Self - Author, Naked Statues, Fat Gladiators, and War Elephants (as Garrett Ryan Ph.D.) See fewer	The UnXplained (2019)