Supernatural season 10 episode 15 is going to be one hell of a ride for the Winchester siblings. Metatron is returning but instead of being vengeful for what has happened, he will be begging for mercy. But could this be his intention for returning or does he have something else in mind? Sam and Dean also have a lot of things to deal with in the new episode, which unfortunately is not going to air anytime soon.

The CW's long-running show is having a long break right now, so instead of airing a brand new episode, the network has decided to show a rerun episode of 'The Flash.' Supernatural season 10 episode 15 is set to air on March 18 at 8 p.m. EST. Instead of having it on Tuesday, the network has moved the show to its Wednesday lineup to fill in the blank slot left by "The 100," which already wrapped up season 2.

Previously on Supernatural, the fight between Dean and Cain ensued and it was obviously the best physical confrontation this season. Dean managed to slay Cain, but his worst fears have returned. Unfortunately, there is no cure for the Mark and Dean will be living his life in reverse. What this implies is that he will also do what Cain did to his brother Abel. Dean could be the one to kill his own brother Sam.

Cain even told Dean, "Has it never occurred to you, have you never mused upon the fact that you're living my life in reverse? My story began when I killed my brother and that's where your story inevitably will end." Then he added another caveat, "First you would kill Crowley. There will be some strange mixed feelings on that one, but you have your reason, you will get it done, no remorse. And then you will kill the angel Castiel, now that one, that I suspect would hurt something awful." Finally he said, "And then, then would come the murder that you will never survive, the one that would finally turn you into as much of a savage as it did me...Your brother Sam. The only thing standing between you and that destiny is this Blade. You're welcome, my son." Could Cain's words be the hint on the ending of the series?

Also in the upcoming Supernatural season 10 episode 15, fans will see the real plan of Rowena who has started to pit Crowley against the Winchester brothers. Last week, she told her son that Sam and Dean are not his real friends since they lied to him about the First Blade. Instead of giving the First Blade back to Crowley after slaying Cain, Dean instead gave it to his friend Castiel. Does this spell the start of the end of the Winchesters' relationship with Crowley? Find out by tuning in on The CW or by watching Supernatural season 10 episode 15 online.

"The Things They carried" is set to air on March 18. Tune in on The CW then or simply watch Supernatural season 10 episode 15 online using the free online stream link we will be providing when the show returns. In case you missed last week's episode, check it out here.