Bones: Season 3, Episode 5

3 - 5: Mummy in the Maze

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.