“Prodigal Son (Part II)” – Parker’s pursuit of vengeance for his father’s murder could have deadly consequences, while his sister, Navy vice admiral Harriet Parker (Nancy Travis), faces an impossible choice, on the part two conclusion of the 23rd season premiere of the CBS Original series NCIS, Tuesday, Oct. 21 (8:00-9:00 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)*.