Booth tries to convince himself that he has moved on after Brennan rejects him in season 5 and meets a woman, Hannah Burley when serving in Afghanistan.
The Gravedigger gets shot by an old sniper friend of Booth's when being transported to court. The sniper was paid by the Kent twins' (victims of the Gravedigger) father but then decides to become a serial killer himself. The result ends up in a character death
Seven months after both Bones and Booth left the country at the end of last season, Caroline calls them back to the Jeffersonian to help save Cam's job, as they work with her and the rest of the team to solve a controversial case.
The team tries to identify a couple whose remains were found in a cave in a national park. A visit by Booth's girlfriend, war correspondent Hannah Burley, forces Brennan to take another look at her relationship with Booth.
Brennan and Booth investigate the remains of a young man who was seen the previous evening at a Jersey-shore nightclub. Angela does her best to keep her pregnancy secret and Hannah bonds with the squints.
A dismembered corpse is identified as a bounty hunter, and the team find they're not the only ones looking for a fugitive who is wanted for murder. Brennan makes children's show star, Professor Bunsen Jude, her new intern.
The team investigates the case of a body found in a shower with ties to a counterfeit operation. Booth and Hannah discuss his relationship with Brennan and Angela and Hodgins map out the future for their family.
The "Gravedigger" is blown away in front of the courthouse as she's delivered for a final appeal before her execution, and the hunt is on to find the sniper. It turns out to be a sharpshooter with a connection to Booth.
A body dressed as a scarecrow and found in a cornfield turns out to be a polygamist, but Booth and Brennan detect resentment among the man's three wives. Cam worries about the stability of her relationship with Dr. Lidner.
A BMX rider's remains on a warehouse roof appear to be the result of a stunt gone terribly awry, until Brennan and Booth uncover critical evidence that suggests the victim's death may not have been an accident.
A wedding planner's remains are found in a tanning bed on Valentine's Day. Meanwhile, Cam hopes the investigation doesn't get in the way of her holiday plans and Hodgins learns that the most romantic gifts don't come with a price tag.
A blackout during a blizzard hinders the investigation of a murder case that could have far-reaching consequences. Sweets gets a little too interpersonal when Brennan and Booth find themselves trapped in an elevator.
Booth calls on Walter Sherman, a fellow soldier with a bloodhound's tracking skills, for help with a case involving a 17th-century treasure map and the remains of a maritime-museum security guard found in the Everglades.
A murder victim made himself few friends by being overly honest, and team members find out why when they begin being more honest with each other. Meanwhile, Angela urges Hodgins to deal with the fact that she's pregnant.
The unidentifiable remains of a male bowler are found lodged in the automatic pinsetter of a bowling lane. With no clear lead in the case, Booth and Brennan go undercover and join the very competitive team in hopes of finding clues.