'Supernatural' season 11 finale spoilers, plot news: The Winchester brothers fight with Amara; Is Chuck gone for good?

The CW's hit TV series "Supernatural" will air its season-ender tomorrow, and viewers will finally see if the Winchester brothers can figure out a way to defeat Amara.

To provide a short recap, last week's episode titled "We Happy Few" featured the much-anticipated confrontation between Chuck (a.k.a. God) and his sister Amara (a.k.a. the Darkness). Unfortunately, Chuck was defeated by Amara, and he later on fell to the ground. Amara went on to say that he is not yet dead, but he will soon be. "He is dying. My brother will dim, and fade away into nothing. But not until he sees what comes next, not until he watches this world, everything he created, every single thing he loved turn to ash," she said. The show ended with Amara giving a scary warning: "Welcome to the end."

The official synopsis for "Alpha and Omega" reads:

"God (guest star Rob Benedict) comes to a decision about Amara (guest star Emily Swallows) that has direct repercussions for Sam (Jared Padalecki) and Dean (Jensen Ackles)."

It is now up to the Winchesters how they will put an end to Amara's evilness once and for all. As seen in the promo clip, Sam and Dean speak to the last remaining members of God's team, saying, "We are collecting souls to build a bomb to blow the Darkness to hell." In the next scene, Rowena clarifies to Dean that he will not only carry the bomb, but he will instead be the bomb. The clip ended with Dean arriving in Amara's territory, which seems like the biggest highlight of the episode.

Will Chuck/God survive after what Amara did? What happens to Castiel following Lucifer's death? Find out all the answers in the "Supernatural" season 11 finale titled "Alpha and Omega" which airs tomorrow at 9 p.m. EST on The CW.