They actually showed this after the episode! But here it is so we can rewatch and analyse it.
The BMOL think Sam and Dean have gone off the reservation. Mick gets orders to assimilate or eliminate the Winchesters? He might be brainwashed? Mary has something to do with this or at least is in the episode? Is that Eileen I saw briefly? Is she hunting on her own, or is she now part of the BMOL? What do you think? Let us know in the comments or in the discussion thread for episode 17,