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NASA's Unexplained Files

Season 4 Episode 8: Mar's Deepest Secret

British astronomers, working with the CIA, uncover a hidden truth by intercepting Soviet moon photos.

Season 4 Episodes:

Episode 1 Pluto's Stranger Things

1. Pluto's Stranger Things

Aired: Aug 30, 2016

A groundbreaking find on a distant star reveals extraterrestrial technology, ...

Episode 2 Rise of the Planet Killer

2. Rise of the Planet Killer

Aired: Sep 6, 2016

A mysterious image on Mars sparks intrigue, while dusty Apollo archives revea...

Episode 3 A President's Close Encounter

3. A President's Close Encounter

Aired: Sep 13, 2016

In the next episode, a NASA astronaut recounts the harrowing experience of th...

Episode 4 The Earth Next Door

4. The Earth Next Door

Aired: Sep 20, 2016

A newly discovered planet near Earth sparks astronomical excitement, while a ...

Episode 5 Curse of the Full Moon

5. Curse of the Full Moon

Aired: Sep 27, 2016

Survival on a frozen lake: Cosmonauts battle to stay alive after their spacec...

Episode 6 Did Earth Have Two Moons?

6. Did Earth Have Two Moons?

Aired: Oct 4, 2016

A groundbreaking find implies that Venusian clouds may have contributed to li...

Episode 7 Mystery of the Invisible Planet

7. Mystery of the Invisible Planet

Aired: Oct 11, 2016

A charismatic imposter, posing as an astronaut and CIA agent, successfully in...

Episode 8 Mar's Deepest Secret

8. Mar's Deepest Secret

Aired: Oct 18, 2016

British astronomers, working with the CIA, uncover a hidden truth by intercep...

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Main Cast

Erik Dellums

Erik DellumsNarrator

Appearances

James F. Bell

Leroy Chiao

Info about NASA's Unexplained Files

Seasons: 6

Current Status: Returning Series

Network: Science

Production Countries: United States, United Kingdom, India

Genres:Documentary