After Booth's "funeral" (which was in fact a covert operation, Booth being very much alive), a human jawbone shows up at the Jeffersonian, Brennan and the team quickly realize the Gormogon serial killer has struck again. In a shocking turn of events, an explosion in the lab injures Zack and Hodgins, Cam discovers that Gormogon's silver skeleton is missing from the basement vault. The team realize that it is an "inside job" and every Jeffersonian employee as well as Booth and Sweets become suspects.