After a much-needed break, forensic anthropologist Dr. Temperance Brennan (Emily Deschanel) and FBI Special Agent Seeley Booth (David Boreanaz) return to the Jeffersonian Institute, along with their team of investigative "squints," for another darkly humorous season of murder, mystery, controversy and chemistry. In addition to a vast array of personal crises, ranging from Angela's secret pregnancy to Booth's new relationship with a beautiful reporter, the team tackles a complex caseload of gruesome crimes that includes facing a murderous Chupacabra, a trip to the Jersey Shore, the final return of the Gravedigger, and a vigilante sniper with a deadly link to Booth's past.