The last stand.
Everyone is gone. Twisting the knife in his victory over the Winchesters, Chuck has wiped everyone off the face of the earth – save Sam, Dean and Jack. Without any hope, the Winchesters try to bargain with Chuck and offer their lives in exchange for everyone.
Don't fear the reaper.
As Chuck was the man behind the curtain pulling the strings all along, the plan is in pieces and Jack is a bomb of divine energy waiting to go off. The Winchesters and Castiel are running out of time with no way to contain the destruction when suddenly Billie appears. They explain how the plan was doomed to failure and she is none too pleased.
The end is nigh.
After seeing the signs of his return in the stars, Amara knows that Chuck is back. After arriving at the bunker, she tells Sam and Dean that the time is now. With one final ritual remaining, Jack and Dean hit the road but Sam stays behind.
The darkness returns.
At Patchwork, a community place or worship, the weary can take shelter within its walls because all are welcome, regardless or circumstance, faith or creed. While walking home from volunteering, Conner hears someone call his name in the alley for help but when moves closer to get a better view, he's attacked and taken.
Stand by for full power.
When more and more mechanical issues start creeping up in the bunker, Dean knows it's time to roll up their sleeves and fix the problem. After going into the boiler room, he and Sam notice that the power is noted to still be in standby mode.
So God walks into a Radio Shed...
When browsing the latest selection of TVs and home theatre equipment, the sales associate shows Chuck all of the options that he has available. There's so many that Chuck realizes he doesn't need more – he needs less.
The right thing isn't always easy; sometimes it's hard and ugly.
The plan to keep Jack in the box has failed miserably. Now free from its confines, Jack unleashes his power on Castiel and the Winchesters before taking off. Now that Jack has proven more dangerous than ever, Dean thinks the only solution is to put the monster down that killed his mother.