Ep 15. The Stranger

Without A Trace season 4 episode 15, titled "The Stranger," follows the FBI's Missing Persons Squad as they investigate the disappearance of a young woman named Rachel Monroe. Rachel was last seen leaving her job at a local diner and getting into a car with a man that nobody knew. As the team works to uncover clues about Rachel's disappearance, they discover that she was living a secret life and keeping secrets from her loved ones.

Jack Malone, the team's leader, begins the investigation by interviewing Rachel's co-workers at the diner. He also talks to the man who picked her up in the car, who claims that he gave her a ride to the airport so she could catch a flight. Jack doubts the man's story and believes that he may be involved in Rachel's disappearance.

Meanwhile, Samantha Spade, another member of the team, interviews Rachel's sister, who reveals that Rachel had a history of running away and disappearing for long periods of time. Samantha suspects that Rachel may have gotten involved with a dangerous group of people during one of her previous disappearances.

As the investigation continues, the team uncovers more and more about Rachel's past. They discover that she had a boyfriend who was abusive and that she may have been involved with a cult. They also uncover evidence that suggests that Rachel's disappearance may be linked to a string of murders that have been occurring in the area.

As the team gets closer to solving the case, they receive a shocking revelation that changes everything they thought they knew about Rachel's disappearance. With time running out, they must race against the clock to find Rachel before it's too late.

Overall, "The Stranger" is a gripping and intense episode of Without A Trace that highlights the team's expertise in investigating missing persons cases. As the team gets closer to uncovering the truth about Rachel's disappearance, they face unexpected twists and turns that keep viewers on the edge of their seats. The episode also touches on important themes such as domestic abuse, cults, and the impact of past trauma on present-day decisions.