A human jawbone found at the Jeffersonian alerts Brennan and the team that the Gormogon serial killer has struck again; a lab explosion lands Zack in the hospital; Gormogon's silver skeleton disappears from the vault.

An aspiring singer is murdered and, as Brennan and Booth investigate the musician's fans and foes, one obsessed woman transfers her affections to Booth.

When Max goes on trial for the murder of FBI Deputy Director Robert Kirby, all the team members but Brennan are called as expert witnesses for the prosecution.

After a woman's car is run off the road, only her baby survives; Booth and Brennan go to the woman's hometown to investigate.

Brennan and Booth investigate the college-basketball world to determine who is responsible for the murder of a player on a nationally ranked team.

When the remains of a professional motorcycle racer are found in a hot spring, the team suspects his rival to be the murderer; Dr. Lance Sweets forces Booth and Brennan to accompany him on a double date.

Three days before Christmas the body of a bearded man in a tailor-made Santa outfit turns up in a sewer; Brennan visits her father in prison and plots a nontraditional holiday reunion.

After construction workers find an archbishop's body with the kneecaps surgically removed, the team returns to the case of the Widow's Son serial killer.

When high-school classmates reunite to unearth a time capsule buried 20 years earlier, they find the corpse of an adolescent friend inside; while combing through the victim's life, the team members rehash their own teen years.

The team suspects colleagues when the remains of a young Jeffersonian intern are found in the building's incinerator; Booth poses as Cam's boyfriend and accompanies her on a family get-together.

When mummified remains are found at Halloween attractions, Brennan and Booth realize that they must find the killer by Halloween or there will be another death.

When the founder of an organic supermarket chain is found dead, Brennan and Booth suspect foul play by a rival farmer; the two agents visit a new psychiatrist, who warns that the FBI may separate them.

The team investigates a footless corpse that was found in the woods; Brennan and Booth's questioning leads to several suspects, including the victim's wife; Angela agrees to undergo hypnosis to remember her former husband's name.

Brennan and Booth investigate when a soccer mom is blown up in her minivan; the investigation uncovers that the woman was a member of the National Liberation Army.

A skull smashes the windshield of a car driven by a group of teenagers on the freeway; a trail of suspects leads Brennan and Booth to a strange cannibalistic society; Cam suggests that Angela hire a private investigator to find her ex-husband.