Adriana Demeo

FBI Special Agent Seeley Booth enlists Dr. Temperance Brennan's help when a decomposed body is found in a local alley and the cause of death is unknown. As Brennan tries to assess if a murder has been committed, the details of the case draw her in deeper, and she's determined to help Booth find the teen's killer.

Erin is overwhelmed with guilt after a man she set free is accused of killing a cop. Also, Frank and Mayor Poole continue their game of political chicken over Frank's reappointment as commissioner, and Danny and Maria investigate a case of a cop who has gone AWOL.

Veronica helps animal researchers track down their missing monkey by going undercover. Meanwhile, Mindy O'Dell asks Keith to investigate her husband's death.

In the landmark 100th episode of "Without a Trace," the team searches for a family man, Aaron Gibbs (ERIK LA SALLE - "ER," "One Hour Photo"), who has been emotionally haunted and financially harmed by living through and being displaced by Hurricane Katrina. Aaron's wife, Sherise (LISA GAY HAMILTON - "The Practice," "The Sum of All Fears"), tells the investigators that she last saw Aaron the previous morning when he left their Queens motel room. Supposedly, Aaron had gotten a temporary construction job in New Jersey after being fired from a construction job with his cousin, Chuck Barr (MICHAEL BEACH - "Third Watch," "ER"). But the team learns that Aaron, whose truck was found abandoned and burned, actually quit his cousin's job and lied about having found work in New Jersey. Wondering what else Aaron may have been hiding from his wife, the agents entertain theories of foul play and suicide, as well as the possibility that Aaron chose to run away from his mounting financial woes.

The team investigates when the teenage son of a Secret Service agent disappears. They discover a long-festering secret that sets in motion a deadly chain of events. Recurring guest star Steven Weber appears as Clark Medina.