Bones' latest adversary makes his debut tonight, or at least his "work" does.
In the show's 2012 premiere - which was actually its 2011 final postponed by a month, and giving way to another lengthy hiatus after tonight - the team investigates what appears to be a murder scene at a national monument.
The only clue left is a coded message in human blood - and vertebrae, reassembled in a way that even gives Brennan pause - that will be the beginning of a scavenger hunt for the solution, courtesy of their mysterious foe.
Meanwhile, Booth and Brennan look for a new home. Man cave and girl cave required.
Watch three clips from "The Crack in the Code" below ...