When Castiel is surveying the aftermath in the diner in which Eve is killed and Crowley appears, the song that begins playing on the jukebox is "Miracles" by Jefferson Starship
. Earlier Dean dubbed the monsters that Eve had perfected "Jefferson Starships" because "they're horrible and hard to kill." The lyrics to the chorus of Jefferson Starship's "Miracles" have some interesting correlations to Castiel's growing struggles with his faith in God and uncertainty in his decisions. See more
Well, you know what? Maybe it's like iron or silver, you know? Hurts them, not us.
Maybe, but a fat lot of good it does us till we find that bitch.
I'm looking, but I'm thinking maybe it's time you made a call.
Why's it always gotta to be me, huh? It's not like Cass lives in my ass. The dude's busy.
[Castiel appears behind him
Cass, get out of my ass.
I was never in your...