Air date: 10/23/07

Booth and Brennan are called to investigate a decomposed body found on the grounds of a organic composting site. The body, belonging to the founder of an organic supermarket chain, was indicated by its unusually high temperature to have been incinerated. The team discovers a double homicide when flesh from another body is found, which turns out to have belonged to the first victim's daughter. Meanwhile, the FBI forces Booth and Brennan to undergo psychiatric counseling.

Mummy in the Maze

Air date: 10/30/07

The FBI is called to investigate after the mummified remains of a teenage girl are found in a Halloween-themed maze. Brennan and her team determine the girl has been dead for about a year. Another mummified remains of a teenage girl are found at a Halloween amusement park funhouse, who they determine to have been killed approximately two years ago. When the team finds out a third teenage girl is missing, they realize they have until the Halloween holiday to save her.

Intern in the Incinerator

Air date: 11/6/07

Employees of the Jeffersonian Institute become murder suspects when the remains of a Jeffersonian intern is found in the building's incinerator. Booth, Brennan and their team set about to investigate her death and find she had been working on the Gormogon case, which is still open. They acquire further motives for her death when they discover she had been in a romantic relationship with a Jeffersonian employee. Meanwhile, Booth poses as Cam's boyfriend and accompanies her to her family get-together.

Boy in the Time Capsule

Air date: 11/13/07

The body of a teenage boy is found by his former high school classmates to have been hidden inside a time capsule that was buried 20 years ago. As the team investigates the class of 1987 to find the boy's killer, they find a disk among his belongings, containing a game which would have been a landmark title in 1987 if released. They also discover he was the father of a classmate's son. Brennan and Booth share high school memories while they receive some psychological profiling advice of the killer from their therapist, Dr. Sweets.