Air date: 9/25/07

The team investigates a case concerning a skull smashing through the windshield of a group of teenagers' car. The skull belongs to a violinist who disappeared after a concert and may have been a victim of cannibalism. While Zack is away, Brennan searches for a new assistant. Angela and Hodgins hire a private investigator to track down Angela's ex-husband, who is identified with the nickname "Berimbau”.

Soccer Mom in the Mini-Van

Air date: 10/2/07

A minivan explodes, killing its sole occupant, a woman who has been known to the FBI for nearly thirty years. The team investigates the crime which has links to a violent crime the woman was involved in while a member of the National Liberation Army in the 1970s. Meanwhile, Brennan visits her father, who is in prison after being arrested by Booth.

Death in the Saddle

Air date: 10/9/07

After the decomposed body of a man, whose feet were removed and arms bound, is found in the woods, the team is called in to investigate. The man is discovered to have stayed at an S&M pony play retreat and was killed with a hoof knife. His wife discovered him at the retreat with another woman just before he died, and both become suspects in the case as well as the lover's ex-husband. Meanwhile, Angela attempts to go under hypnosis to find out the name of her husband nicknamed Birambau to divorce him in order to marry Hodgins. Though the hypnosis fails initially it ultimately leads her to the name, Grayson Barasa.