NASA's Unexplained Files

Season 4 Episode 8: Mars's Deepest Secret

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

Genre:

Documentary, Talk, Mystery

Seasons:

6

Episodes:

47

Quality:

HD

Status:

Returning Series

First Air:

2012

IMDb:

7.1