NASA's Unexplained Files Mar's Deepest Secret (Season 4, Episode 8)
TV-PG
TV Episode | 42 min | Documentary

NASA's Unexplained Files

Mar's Deepest Secret (Season 4, Episode 8)

TV-PG

TV Episode | 42 min | Documentary

British astronomers working for the CIA intercept Soviet photos of the moon. A malfunction on the ISS could poison its crew with deadly ammonia gas. A startling image taken by a NASA probe points to evidence that life could exist on Mars.

Directors

Joe Keenan | Kasia Uscinska | Adam Warner

Producers

Fabio Cerveira | Timothy Clarkson | Susanna Hall

Editors

Alistair Kerr | Antonio Morra | Tom Parker | Quinton Smith

See all filmmakers & crew (44)

Edit Released

Updated Oct 18, 2016

Release date

Oct 18, 2016 (United States)

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Cast	+ Add Cast
24 cast members

Name	Known for
David Aguilar Self - Author & Astronomer Self - Author & Astronomer See fewer	Chesley Bonestell: A Brush with the Future (2018)
James F. Bell Self - Planetary Scientist (as Jim Bell) Self - Planetary Scientist (as Jim Bell) See fewer	Nova (1974)
Leroy Chiao Self - NASA Shuttle Astronaut & ISS Commander Self - NASA Shuttle Astronaut & ISS Commander See fewer	Ancient Aliens (2009)
Marc D'Antonio Self - Astronomer & Image Analyst Self - Astronomer & Image Analyst See fewer	Sons of the Fatherland (2017)
Erik Dellums Narrator (as Erick Todd Dellums) Narrator (as Erick Todd Dellums) See fewer	Homicide: Life on the Street (1993)
Becky Ferreira Self - Science Journalist Self - Science Journalist See fewer	Rachel Bloom: Fuck Me, Ray Bradbury (2010)
Stanton Friedman Self - Aerospace Nuclear Physicist Self - Aerospace Nuclear Physicist See fewer	UFOs and Science - Slaying the Dragon (2018)
Matt Genge Self - Planetary Scientist Self - Planetary Scientist See fewer	How the Earth Was Made (2009)
Slava Gerovitch Self - Russian Space Historian Self - Russian Space Historian See fewer	NASA's Unexplained Files (2012)
Ben Guarino Self - Science Writer Self - Science Writer See fewer	NASA's Unexplained Files (2012)
Jacqui Jeras Self - Meteorologist Self - Meteorologist See fewer	CNN NewsStand (1998)
Richard Jurek Self - Space Historian / Author Self - Space Historian / Author See fewer	Chasing the Moon (2019)
Pascal Lee Self - Planetary Scientist Self - Planetary Scientist See fewer	Passage to Mars (2016)
Chris McKay Self - Planetary Scientist Self - Planetary Scientist See fewer	The Mars Underground (2007)
Tom Nichols Self - National Security Analyst Self - National Security Analyst See fewer	Succession (2018)
James E. Oberg Self - Space Historian Self - Space Historian See fewer	The Apollo Chronicles (2019)
Hakeem Oluseyi Self - Astrophysicist Self - Astrophysicist See fewer	The Stars in My Soul
Christopher Orwoll Self - Director, New Mexico Museum of Space Science Self - Director, New Mexico Museum of Space Science See fewer	NASA's Unexplained Files (2012)
Nick Pope Self - Defense Analyst Self - Defense Analyst See fewer	Aliens from the Abyss: The Dark Side of the UFO Phenomenon (2025)
Peter H. Schultz Self - Planetary Geologist (as Peter Schultz) Self - Planetary Geologist (as Peter Schultz) See fewer	Ancient Aliens (2009)
Sara Seager Self - Planetary Scientist Self - Planetary Scientist See fewer	Solis (2018)
Amy Shira Teitel Self - Space Historian and Author Self - Space Historian and Author See fewer	The Vintage Space (2012)
Brian Weeden Self - Space Policy Expert Self - Space Policy Expert See fewer	Space's Deepest Secrets (2016)
Anatoly Zak Self - Editor, RussianSpaceWeb Self - Editor, RussianSpaceWeb See fewer	NASA's Unexplained Files (2012)