19. Trojan Horse

Reese monitors Michael Cole's family where Shaw finds him. Finch calls with a new number, that of Monica Jacobs ( Tracie Thoms ), a high-ranking employee of a technology company called Rylatech. Jacobs is being hunted and framed for industrial espionage by other employees who are secretly working as spies for China and Greer's shadowy company Decima Technologies. Meanwhile, Shaw tracks Finch to the library, where she grabs a list of Root's aliases from the wall, telling Finch she has a new project. While monitoring Beecher, Fusco discovers that he's innocent of any wrongdoing.

Meanwhile, Quinn realizes that Beecher knows too much about his role in HR, and arranges to have him killed. The Machine gives Finch his number, but too late for Carter and Fusco to save him. The next morning, Finch is taking a walk around town with Reese, telling him that he has identified Decima Technologies, the company which employed Kara Stanton to upload a virus onto the Machine. Unknowingly behind them, Greer is on the phone, and when he hangs up, he looks at his phone, which has a countdown ticking on it, and smiles.