Dean didn't even stop when he arrived in the bunker, he beelined right past his husband and towards the library.

"Dean? What's going on, where's-" Cas tried getting up and following to frantic Dean.

"I don't even know what the hell happened, one minute they're both with me, and then-" Dean started ranting.

Cas came over and put his hand on his shoulder, "easy, start with the beginning, what happened?" He asked softly.