Constantine summons some demons to tap into all the gossip down south.

Namely Mephistopheles willwork4souls , Crowley vintagebentley , Cho darkenedcho , and Amon princeofwrath .  They fill him in that a lot of the trouble seems to be on account of angels going rogue.  Mephistopheles points him in the direction of Michael and Uriel, so he conjures up some angels as well:  Raguel unjustvengeance and Phanuel iam_phanuel .   They confirm his suspicions, and then he accidentally summons himself smokeandmagic from four years ago.  Oops. 

He also checks on the more earth-bound spirits by talking to the pagan Trickster spittingfoxfire . 

After Phanuel goes off to talk to Michael, and Raguel gets frustrated with John, Constantine calls up Michael himself stillasoldier and they have a frank discussion about the coming War.

Also, Z finds out about the Apocalypse that Constantine is in town to stop  investigate - it was only a matter of time, really.