The CW's Supernatural proved to overstay its welcome on the network, stretching itself out to be far longer than what was necessary. The once-horror show lost its luster after Season 5 and proved that even with a popular following, there wasn't enough strength given to support its long legs.

We all came to understand what the guys wanted to do,  Pedowitz said, explaining that Ackles and Padalecki wanted to go out while the show was still relevant.  Additionally, Pedowitz cited spending time with their families and seeing what else was out in the world  as the guys' reasons for ending the show.