NASA's Unexplained Files

Season 5 Episode 4: Secret Aliens

An astronomer records an unusual signal from a distant star. FBI agents find classified documents at the home of a NASA scientist. When scientists discover strange DNA in the octopus, they examine if their origins could be alien.

Genre:

Documentary, Talk, Mystery

Seasons:

6

Episodes:

47

Quality:

HD

Status:

Returning Series

First Air:

2012

IMDb:

7.1