Dean knew they wouldn't make it out of this alive. Well, not him anyway.
Castiel and Sam were running ahead of him, Cas' coat whipping against the wind. Sam's arm was badly wounded and he had had a hard hit to the head, yet he still managed to beat both him and Cas. Dean admired Sam for that. Though that feeling was short lived due to the fact he was running for his life. They were all running for their lives, and they had to get away, fast.
The hall they were running down was completely straight, no turns, no doorways. You could see that. All they could do was carry on running, as thw angels continued to follow them.
As quick has Dean had blinked, Sam and Cas were out of sight. It looked as though they'd gone down another route, yet they couldn't have! There was no way! Once Dean had caught up to where they had gone, it was too late.
-2 weeks before-
"Dean, you're useless, go and get Sam for me." Demanded Bobby.
"I've been trying to help! It's not my fault I can't read ancient runes or whatever they are! I doubt Sam can either..." Dean moaned as he stalked off to find his brother.
Sam was down in the basement, reading his father's journal when Dean found him.
"Hey Sam! Bobby wants your help translating those runes." Called Dean from upstairs. Of course, he was too lazy to walk down to talk to him.
Sam looked up from the journal. "Aren't you helping him?" He answered.
"Well, yeah... but, Bobby just wants you, alright?"
"Fine. I'll be there in a minute." Sam sighed as he bookmarked his page and stood up. As he started to walk up the stairs the faint swoosh of wings surprised Sam from behind.
"Castiel? What are- CAS?" Sam ran over to Castiel and caught him just in time. "DEAN! DEAN! COME DOWN QUICK!" Sam shouted.
Dean heard Sam's shouting and turned around, he ran down the steps and jumped the last few to find Castiel in Sam's arms, he was bleeding severely from the chest.
"What the... I... Cas, what happened?" Dean pleaded.
"The war... with the angels... it has gone terribly wrong for my side. Raphael has re-awoken the Mother of All." Whispered the angel.
"The what? Who's that?" Dean questioned.
"She is-"
At that moment Bobby walked in. "What's all the shouting about? And then he saw. "Castiel? What in the world ha-"
"Forget about that now!" Cut in Sam. "Help me lift him, Dean."
So the brothers picked up the wounded angel and carefully carried him upstairs.