During Bones' stay in England, the daughter of an American businessman is murdered. The businessman insists that the FBI help with the case, so Booth and Bones investigate. Meanwhile, Angela's husband shows up at the Jeffersonian.
Part of a leg drops into an elevator. The gruesome discovery finds the body had been in the shaft for a few days. The victim was an office manager who was disliked by everyone. As the team investigates, Angela and Hodgins come to terms with their break up.
Half a decomposed body is discovered by a pair of beach combers. They find the deceased was leader of a local religious congregation. When the other half of the body is found, they learn the leader had a hidden past.
A body flies out of an exploding meth lab. As the team tries to identify the body, Booth works on a big case which could boost his career, but he's distracted when his brother shows up and shows some interest in Bones.
Brennan and Booth investigate the remains of a bodyguard of two children who attend a high security school for the children of important people. Also, Cam hires Brennan's father as a teacher which causes some conflicts for Bones.
The body of a victim is found in a frozen lake. Booth identifies the body as a rival hockey player, making Booth a suspect in the crime. Now the Squints have to work with a new agent to solve the crime.
The Gravedigger returns and captures Booth. He wants the evidence that someone has stolen from the case, and he believes that Bones has it. Can the Squints find their friend before Booth becomes the Gravediggers latest casualty?
Booth asks Bones to fix his back again, but she ends up aggravating his condition. While Booth is sidelined, Bones works with Agent Perotta to solve the murder of a woman who was working at a Fantasy convention.
Remains are discovered by a newly wed couple after they literally take the plunge. The squints soon determine the identity of the victim, but discovering the cause of death presents interesting dilemmas as a mysterious corrosive foam secreting from the bones is destroying the remains and causing the Jeffersonian's alarms go off with each test they try. Also, Bones tries to work on her interpersonal skills.
The flattened remains of a woman are found in a recycling plant, leading the team to a wedding planner, the woman's fiancee, and the owner of an online dating service. As the Squints work to solve the case, Bones and Booth are at odds when it appears that someone they know is cheating on a friend/colleague.
Skeletal remains used by a Norwegian Black Metal Band lead the team to explore the underground music scene. Gordon-Gordon prepares to retire from psychology, but not before meeting with Sweets and helping Bones and Booth solve their current case.
Bones asks for Booth's advice on which of her assistants she should hire. Booth gets a call from a friend, a Japanese cop who Booth once worked with in an exchange program, who asks him to check on his sister. Unfortunately they locate her head. Now the squints must locate the body.
The remains of a college student are found in a mascot costume from a rival college. As the squints investigate how the body got in there, Booth finds out what his brother plans on doing with his life after his court martial.