NCIS Gibbs and McGee (Mark Harmon, Sean Murray) must rely on their colleagues to save them from captors in Paraguay in the season premiere. Rocky Carroll, Wilmer Valderrama and Pauley Perrette also star, with guest star Chris Pine. 8 p.m. CBS
Lethal Weapon In the second season premiere, Riggs (Clayne Crawford) has gone rogue in Mexico, seeking vengeance for the death of his wife, targeting Tito Flores (guest star Danny Mora). Murtaugh (Damon Wayans Sr.) is trying to stop his partner. 8 p.m. Fox
The Vietnam War President Nixon begins withdrawing American troops from Vietnam in this new episode of the...