When human remains are found at the site of a block party, Brennan and Booth are called in to investigate. Sweets is called in for help when the politics and scandals of the neighbors link everyone with some type of motive. Meanwhile, Booth's son Parker tries to find him a girlfriend.
When the remains of an Amish youth are discovered near railroad tracks, Brennan and Booth suspect foul play after they learn the young man had been a piano prodigy but disappeared a short time before his Rumspringa, or exploration of the modern world. Meanwhile, Booth helps Cam keep an eye on her stepdaughter.
Brennan and Booth look into the death of a man murdered for the contents of his briefcase. The evidence leads them to suspect that a group of secret operatives were behind the murder, and their suspicions are confirmed when remains of a CIA agent are found in the trunk of a car. When Brennan and Booth question the CIA's Assistant Director of Intelligence, they question the man's allegiance to the U.S. Meanwhile, the financial success of Brennan's latest book leads to a rift between her and Booth; and when Wendell loses his scholarship, the team searches for alternate funding in order to keep their intern around.
For the past six weeks Booth has been recovering from brain surgery, and Sweets has finally certified him as mentally fit to return to duty. Meanwhile, while reading her tarot cards, Angela's psychic reveals that there are several bodies buried under a fountain. Booth and Brennan are skeptical about checking it out, but are surprised when they find the remains of eleven bodies exactly where the psychic said they'd be.
In the fourth season finale, a murdered body is discovered at a popular nightclub called "The Lab." In a unique storytelling twist, the Jeffersonian team takes on unusual roles, including the nightclub staff and law enforcement
After deciding that she wants to have a baby, Brennan shocks Booth by asking him to be the father of her child. Booth can't stop thinking about Brennan's request.
Episode Synopsis: The body of a fraternity member is found inside the costume of a rival university's mascot, but Brennan and Booth may not find a whole lot of brotherly love for the deceased when they learn that he was a BMOC---or big moneymaker on campus. Meanwhile, Booth tries to return a favor for his recently unemployed brother.
Episode Synopsis: Booth helps a detective friend from Japan after the man's sister goes missing in Washington, D.C. During the ensuing investigation that leads to an escort service, Booth and Brennan discover the woman's roommate has also disappeared.
A Jeffersonian coworker dies of heart failure. While at the coworker's wake, Brennan sees the body and is convinced the death was no accident. Brennan asks Booth to help her steal the body so she can further examine it, and an odd mystery surrounding the coworker's cause of death unfolds.
Brennan and Booth delve into the world of death metal music in an effort to discover who killed the bassist of an underground death metal band, whose skeleton was found being used as a stage prop by another death metal band in Norway. Meanwhile, Sweets is working on the book he's writing about Brennan and Booth, and asks Dr. Gordon Wyatt for some input.