Ep 17. Baby Blue

In Person of Interest season 1 episode 17 titled 'Baby Blue', John Reese played by Jim Caviezel and Harold Finch played by Michael Emerson receive a new number from the machine. The number belongs to a woman named Diane played by Natalie Zea. Diane is a doctor who works at a clinic and is known for helping people in need. The team starts investigating Diane and discovers that she is in danger.

While observing Diane, Reese spots a man named Robert, who follows her to work. Robert is an ex-convict who was released from prison a few months ago. Reese follows Robert and learns that he is working for someone and that they are planning to kidnap Diane. Reese reports back to Finch, who comes up with a plan to protect Diane.

Finch approaches Diane and offers to hire her as a doctor for his company. Diane is hesitant at first but accepts the job after he offers her a large sum of money. Meanwhile, Reese takes Robert under his wing and tries to gain his trust. Reese tells Robert that he wants to work for his boss and that he needs to prove himself. Robert takes Reese to his boss, who turns out to be Diane's ex-husband, Mike.

Mike is a wealthy businessman who is trying to get back with Diane. He hires Robert to kidnap Diane and bring her to him. Reese manages to rescue Diane and brings her to a safe house. However, Mike is not willing to give up on his plan to get back with Diane and starts sending his men to search for her.

Reese and Diane start bonding and he learns about her troubled past. Diane had a son who died from leukemia a few years ago, which led to the end of her marriage to Mike. Meanwhile, Finch manages to discover where Mike is keeping Diane's medical records, which he needs to complete his plan to take down Mike's company.

Mike finds out about the safe house and sends his men to attack it. Reese and Diane manage to fend them off and escape. However, they are forced to split up after Diane receives a call that her clinic is under attack. Reese goes after Mike while Diane heads to the clinic to save her patients.

In the end, Reese manages to take down Mike's company and Diane is reunited with her patients. Reese tells Diane that she no longer needs to look over her shoulder and that she can live her life without fear. Diane thanks Reese for all his help and the two part ways.

Overall, Person of Interest season 1 episode 17 titled 'Baby Blue' is an action-packed episode with plenty of twists and turns. It further develops the characters of Reese and Finch and introduces a new interesting character in the form of Diane. The episode explores themes of love, loss, and revenge and showcases the lengths that people will go to in order to protect the ones they care about.