Without a Trace — Episode 11: 4.0

You are watching the episode 4.0 Tara Patterson disappears from a bus stop on her way to an S.A.T. prep course, and the team is called in to investigate the disappearance of the 4.0 student. While investigating, the team soon finds out that Tara is in deeper then they think when they start learning about smart drugs and married men with secrets.