Rehearsing Tragedies

Dean has a knee-jerk reaction to seeing an angel almost get put down at a hunter's market, and thirty minutes later, he's in the Impala with Sam and a supernatural creature that wants to tear their jugulars out with his teeth. Sam seriously doubts they can handle the task his brother has taken on, but he's doing his best to be supportive.

Castiel wants blood. He wants to rip every human that crosses his path into pieces, and he wants these two humans in particular to stop lying and trying to trick him with false niceties and so-called kindness. He's not going to fall for it; he's not stupid or weak. What he will do, however, is find a way to escape captivity. And, of course, brutally kill them before he leaves their underground bunker behind.