VIDEO: First Look - Tonight's All New PERSON OF INTEREST

On tonight's all new episode of PERSON OF INTEREST, titled "Relevance," a lethal and sexy government operative who tracks and stops terrorist threats before they occur finds herself on the run - and the new focus of Reese and Finch's attention. However, their pursuit proves to be their most formidable when they discover that her remarkable skillset equals their own, on Thursday, Feb. 21 (9:00 - 10:00 PM, ET/PT) on CBS. Series Executive Producer Jonathan Nolan directed the episode. Sarah Shahi guest stars as government operative Samantha Shaw.

Check out a first look below!

VIDEO: First Look - Tonight's All New PERSON OF INTEREST