“Radio Active” – In order to stop a terrorist cell carrying out a chemical bombing at an unknown location in the city, the team joins forces with an old school code breaker who is suffering from agoraphobia. Together they decipher a seemingly unbreakable cipher. Meanwhile, Colin wrestles with Toni’s return to the field, and Bill braces for Katie’s response to his recent admission, on CIA, Monday, Oct. 19 (9:00-10:00 PM, ET/PT), on the CBS Television Network, and streaming on Paramount+ (live and on-demand for Paramount+ Premium plan subscribers, or on-demand for Paramount+ Essential subscribers the day after the episode airs)*.