Supernatural: Trailer for Episode 21, Season 12 Released – “There’s Something About Mary”

The trailer for the next episode of Supernatural has been released. This is episode 21 of Season 12, titled “There’s Something About Mary”. This episode will air on May 11, 2017. This is the last episode before the back-to-back season finale episodes, which will air on May 18, 2017.

Watch the trailer below!


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