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.
A female body is discovered at a recycling center, compacted into a stack of cardboard, and the Jeffersonian team is called in to investigate. Meanwhile, Booth and Brennan run into Sweets' girlfriend at a bridal dress shop -- but she's there with another man.
The team is led to a well-known physics research center after finding a piece of a meteorite in the ear of a victim whose pulverized remains were found in a garbage bag. Meanwhile, Angela's dad returns, seeking revenge on Hodgins.
The team investigates the murder of Cam's former fiancé, whose body was found in the tiger cage at the zoo. Sweets and Angela hypnotize one of the murder suspects.
Brennan and Booth investigate the death of a 16-year-old pregnant girl who was found buried in a pile of street salt. During their investigation they uncover a high school "pregnancy pact" between the victim and some of her fellow volleyball players.