Plot summary
Five weeks have passed since Colby Granger was exposed as a spy working for the Chinese government and after being captured and imprisoned, Colby escapes and along with friend and fellow spy Dwayne Carter race through the city, prompting Don and the team to join the search in hopes of recapturing the two men despite the team still struggling to come to terms with the devastating betrayal but all is not what it seems... Mathematics used: Trust metric, set covering deployment, heuristics and Illumination problem
Credits
Adapted from Wikipedia contributors, Numbers season 4. HTML formatting and reference markers removed.