Laurence Cohen

When a terrified young Halloween reveler finds the mummified remains of a teenage girl in a Halloween pumpkin patch maze, Brennan and Booth are called to the scene to investigate. They are perplexed by the fact that the girl appears to have been deceased for at least a year, while Hodgins discovers her body is covered with spider bites. Booth and Brennan later receive word of a second mummy found at Halloween amusement park funhouse, and it appears the victim, another teenage girl, was killed on Halloween approximately two years prior. As the team questions a variety of ghoulish amusement park employees, from the grim reaper to a zombie, they get word of a third teenage girl who has gone missing. Booth and Brennan realize that they have until Halloween to find her before the killer strikes again. Meanwhile, the team gets decked out in costume for the annual Jeffersonian Halloween Ball, and they encounter a few scares of their own.

Vince makes a splash at a convention with his new co-star. When neither Eric nor Shauna can appease a bitter journalist, Turtle sends a pair of professionals to the rescue. Ari gives Drama a rockin' birthday gift.

When a body of a murdered marine is found in the forest, the investigation leads to the local militia and a weapon deal gone wrong.

A panic-stricken Weaver is ordered to give her son to the Lopez family. Carter greets the returning Kem (recurring guest star Thandie Newton), but their meeting with his father, Jack (Michael Gross - "Family Ties"), gets tense after Carter announces plans for his grandmother's estate. During her psychiatric rotation, Abby tries to help a seizure-prone mother, Jordan (Julianne Nicholson), with a controversial drug treatment. Meanwhile, Neela impresses everyone with her lab research, especially when she helps one of the reckless students, Yuri (recurring guest star Archie Kao), after he experiments on himself. In addition, Kovac's relationship with Sam and her son, Alex (recurring guest star Oliver Davis), becomes awkward when the boy's father, Steve (recurring guest star Cole Hauser), returns.

When two office mates plot to rob a casino, their plan ends with the CSIs investigating a murder. (TV-14)