Ep 17. Karma

Person of Interest season 4 episode 17, titled "Karma," follows the ongoing story of Harold Finch and John Reese as they use their skills to track down people involved in acts of violence or potential terrorist attacks. In this episode, the duo focuses their attention on a congressman who has a history of assaulting women.

As the episode opens, the congressman, Peter Yogorov, is being sued by a woman for assault. However, Yogorov denies the allegations, and Finch and Reese are tasked with finding out the truth. Using their extensive surveillance network, the two are able to track down footage of a previous assault by Yogorov on a former staffer, but are unable to find any concrete evidence connecting him to the current lawsuit.

Meanwhile, Root is working on her own case, investigating a group of hackers who are after one of Samaritan's servers. As she delves deeper into the group's operations, Root discovers that they have a close connection to an old friend of hers, and is forced to make a difficult decision.

As the episode progresses, it becomes clear that Yogorov is not as innocent as he seems. When his accuser suddenly dies in a car accident, the congressman's culpability becomes all the more suspicious. Finch and Reese work tirelessly to find evidence that will incriminate Yogorov, while Root races against the clock to stop the hackers from accessing Samaritan's server.

Tensions mount as the two cases intersect, resulting in a thrilling climax that keeps viewers on the edge of their seats. In the end, the truth about Yogorov's actions is uncovered, thanks to the tireless work of Finch and Reese. Root also manages to successfully stop the hackers, but not before making a painful decision that will have lasting ramifications.

Overall, "Karma" is a tightly-plotted and action-packed episode of Person of Interest that will leave audiences eager for more. With complex characters and a gripping storyline, it's no wonder that this show has become a fan favorite.