As the NCIS team searches for Gibbs after wreckage from his boat is discovered, they find out he was tracking a serial killer with journalist Marcie Warren, who wrote an exposé on him.
Tracker, the first new broadcast drama to premiere this season, is also the first freshman scripted series to land a Season 2 renewal. Amid strong ratings following its post-Super Bowl premiere, CBS has picked up a second season of the series starring Justin Hartley after four airings.