'Supernatural' Season 12 Episode 21 Predictions SPOILERS: Mama Winchester Kills Toni, Takes Over Men Of Letters In 'There's Something About Mary'

The twelfth season of "Supernatural" is coming to a close and it could mean big things for the Winchester matriarch. Is Mary Winchester really in trouble in "Supernatural" Season 12 Episode 21? Is it possible that Sam and Dean Winchester's mother might actually kill Lady Toni Bevell and take control of the Men of Letters in "There's Something About Mary"?

It's no secret that the return of Mary Winchester would be a big thing for the CW series. After all, she had started out dead in the show's pilot episode and had remained dead for 11 seasons, save for a few cameos by Samantha Smith in a few episodes. Nevertheless, Mama Winchester appears to have adjusted pretty well since her resurrection in the previous season finale. But could this also mean that Mary is getting ready to be the new leader of the Men of Letters in "Supernatural" Season 12 Episode 21? Will Sam and Dean's mother murder Toni Bevell in "There's Something About Mary"?

The synopsis for "Supernatural" Season 12 Episode 21 reveals that hunters are dying in "suspicious accidents all over the country", forcing Sam and Dean to try and look for their mother to "make sure she's safe" (via ComicBookMovie). However, the description also teases on the possibility that Mary Winchester will face Lady Toni Bevell. This has led to speculations that the two women will be fighting in "There's Something About Mary" and it is possible that the Winchester mom will manage to defeat Toni, as per YouTube. Could Mary then take over and lead the Men of Letters before the season finale?

Can Sam and Dean stop Mary Winchester from killing Toni Bevell? Who will get killed off in "There's Something About Mary"? The truth will be revealed in "Supernatural" Season 12 Episode 21, which premieres on The CW on May 11.