2012 | 7 Episodes

Season 1 of NASA's Unexplained Files premiered on March 27, 2012.

2015 | 8 Episodes

Season 2 of NASA's Unexplained Files premiered on March 2, 2015.

2016 | 8 Episodes

Season 3 of NASA's Unexplained Files premiered on February 23, 2016.

2016 | 8 Episodes

Season 4 of NASA's Unexplained Files premiered on August 30, 2016.

2017 | 8 Episodes

Season 5 of NASA's Unexplained Files premiered on April 12, 2017.

2019 | 8 Episodes

Season 6 of NASA's Unexplained Files premiered on April 11, 2019.