Unknown Sender
Unknown Sender ran for a total of 3 seasons.Season 1
The show Season 1 was released on October 28, 2008 and ran for 6 episodes.
Season 2
The show Season 2 was released on June 20, 2011 and ran for 3 episodes.
Season 3
The show Season 3 was released on December 11, 2012 and ran for 3 episodes.