It looks as if Amara is continuing to grow up pretty fast. Has she finally caught up with Dean? How strong is their bond still? Dean is looking pretty serious as he and the growing Darkness have a chat.
Castiel looks like he's about to throw down with Metatron. However, the scribe seems pretty eager to make one last request or deal. Or is he just wondering if Castiel wants to take him out for waffles again?
Sam and Dean will be brothers fighting to save people and hunt things to the bitter end. And it's good to see that among all the hunts and the battle with the Darkness, the two can have a solid sit down and just be brothers.
The Winchester brothers are definitely having a serious conversation. Maybe Dean has told Sam about his connection with the Darkness. Maybe the two have come up with a plan to even stop it. Or maybe they just can't decide where to get lunch next.