2012 | 22 Episodes

Season 1 of Unsealed: Alien Files premiered on September 17, 2012.

2013 | 20 Episodes

Season 2 of Unsealed: Alien Files premiered on September 16, 2013.

2014 | 20 Episodes

Season 3 of Unsealed: Alien Files premiered on February 21, 2014.

2015 | 20 Episodes

Season 4 of Unsealed: Alien Files premiered on April 24, 2015.