CBS | 8:00 pm

After Gibbs (Mark Harmon) and his NCIS team uncover a secret dogfighting ring, the case leads to a completely unexpected move by one of the team members in a new episode called "Watchdog." The guest cast includes Laura San Giacomo, Hugo Armstrong, Max Adler and Nancy Linehan Charles; Sean Murray, Emily Wickersham, Wilmer Valderrama and Maria Bello also star.