sorry i didn't mention

Mick Rawson and John Constantine are twins. The BAU doesn't know this. Oh look, it's someone's birthday.

(In which Chas lost an eyebrow, the Sex Pistols are better than The Clash, and Mick should've shared his hangover cure.)

*If you haven't seen CM:SB, the notes at the beginning explain the characters. Also, you should go watch it.