Warning: Spoiler Alert
Finally, someone saying something that I've been thinking when it comes to Mama Tran ... we never saw her body, and all we have is Crowley's word from when he was messing with Kevin's mind that she was dead in the first place. Sure, it's Crowley saying that there was something fishy going on originally, and he is more than likely only messing with Kevin's mind again, but that doesn't mean that what he's saying couldn't have a tone of truth to it. Since we have never seen a body, and no one has gone looking for her, we don't know for sure that she isn't alive somewhere. She very well might be, since she might have come looking for Kevin at this point ... but she might have also stayed away cuz she thought that it was the right thing for her to do.
And I don't see how the boys would have thought that something hinky wasn't going to happen when they left Crowley in the bunker with Kevin, and they went off. Sure, they weren't going to help their friends, but they had to realize that it probably wasn't a good idea to leave Kevin alone there with the guy that tortured him. At some point, he was going to want to take some kind of revenge, even if it wasn't necessarily right then.
Also, the fact that Crowley is giving up names now ... there is something fishy about that. Kevin did not hurt him or scare him enough to make him want to give away anything. It may be nothing more than Crowley not wanting to be caught in such a pickle when Abaddon comes calling. She isn't likely to get into the Devil's Trap herself, but she would probably send someone else in there to dispatch him while he's otherwise disposed. It might be another demon, one who would be able to at least move around within the Trap since they wouldn't be handcuffed (even if she would probably leave whoever it was in there once the dead was done); or she could always try to get someone else to do the work for her ... whether it's a human that she is able to trick, or some other kind of monster that won't be effected by the Trap. But I get the feeling that he realizes that she's gunning for him, and the more demons that he gets out of the way, the less likely it is that someone will come for him ... even if he couldn't possibly know for sure who might be coming.
It seemed like we were supposed to think that there was some kind of significance to the fact that the bar was burned when Dean grabbed his duffel ... burned almost the same way that we see the burning that is left behind by the angels. I'm not sure if we're supposed to think that Ezekiel isn't exactly who he claims to be, or if the people that Abaddon isn't using who we might suspect that she would have (at least not in all cases). It seems more likely that we are supposed to think that there is something going on with Ezekiel and be worried about the fact that he's running around in Sam's head (especially after we were supposed to be suspicious about the fact that Sam is happy ... since the default position of the boys is misery and lying about it). I am not entirely convinced at this point that we really have a reason to be suspicious about Ezekiel, but it's very obvious that the writers want us to think that there is a reason. I would really love it if there was all sorts of suspicious bitch!face from Dean when it comes to Ezekiel, but when it comes right down to it, we find out that there was nothing to be afraid of to begin with. I'm not going to be holding my breath on that one, but it's at least something to hope for.