James McDonnell

When the bodies of twin teenage boys kidnapped five years earlier are discovered in Pennsylvania, Booth and Brennan find themselves on the trail of the Grave Digger, a notorious serial killer whose M.O. is to kidnap, bury his victims alive and make a single, exorbitant ransom request. If the money is not paid in the specified period of time, there is no further communication and the victims are left to die. During the investigation, Brennan and her scientist colleague Dr. Hodgins become the Grave Digger's latest victims, forced to try to solve their own kidnapping from an underground grave.

The city anxiously anticipates the arrival of Heather Taffet, more notoriously known as “The Gravedigger,” for her final appeal after being sentenced to death for a kidnap-murder and a series of similar coldblooded crimes. But when a bullet targeted at The Gravedigger is fired from a distance and hits her, the Jeffersonian team is tasked to piece together the sniper’s precise location as well as identify the suspect and his motives. With the help of probing investigator Caroline Julian (guest star Patricia Belcher), Booth and Brennan put together a list of likely suspects, but the evidence and the remarkable skill needed to pull off the crime leads the team to believe that the crime was an inside, professional job, leaving Brennan’s father Max (guest star Ryan O’Neal) and even Booth as plausible suspects. Meanwhile, Sweets attempts to put on a brave face after being caught in the firestorm just moments following a chilly encounter with The Gravedigger.

Carol is suffering because she has to fire two of the nurses. At that night, the girl whom Dr.Ross care about arrives ER by raping incident. Dr. Carter spends the last night with Abby at her office.

A college visit leads Fran to worry that she embarrasses Brighton.

In the series finale, David finally embraces a demon; Keith gives 'tough love'; Nathaniel talks to his younger son; Brenda delivers and fights Nate's negativity; Claire gets an exciting call; Ted inspires sexy photos; Margaret is impressed to see Olivier's nurturing side; George's limitations eclipse his intentions; and Claire drives into her future.