8/7c CBS
It's a classic device that never fails to leave armchair viewers white knuckled — put the good guys and the bad guys together in a place where there's no escape! Add to that the element of not knowing the enemy's identity and things get even more tense. Tony and Ziva return from Paris as escorts assigned to guard a government witness back to the U.S. when they learn that an assassin may be along for the ride. — Bill Ecklund

American Idol

8/7c Fox
Idol wasn't idle last week, blowing into the Windy City with guest judge Shania Twain and adding heat to the Sunshine State with stand-in appraiser Kristin Chenoweth. The usual good, bad and ugly of the audition rounds continue when the series heads west and lands in Los Angeles, an apt place considering it's the long-established locus for superstar success stories — and, sadly, broken dreams. Pop songstresses Avril Lavigne and Katy Perry are the guest judges. — Dean Maurer

9/8c ABC
Last season, the Lost writers moved the island through time; now ABC programmers are moving Lost through time (slots, anyhow) to Tuesday. The sixth (and final) season begins next week, but tonight ABC is repeating last season's finale, in which we finally get to know Jacob (sort of), and Locke and Ben finally see him — just before we get to see what's in that crate on the beach. Meanwhile, Jack's finally successful in detonating the nuke. Actually, it's Juliet who does the detonating. — Paul Droesch

24/7 Jimmie Johnson: Race to Daytona
10/9c HBO
This up-close-and-personal series makes its first foray out of the ring, abandoning boxers like Oscar De La Hoya and Floyd Mayweather for four-time NASCAR Sprint Cup champion Jimmie Johnson. While the first three episodes should be interesting, following the driver and his crew as they prepare for the Super Bowl of auto racing, the Daytona 500, the fourth and final program could be the most fun — it covers race day. — Dave Roeder

Teen Mom
10/9c MTV
The first year of parenthood can be a trying time for any parent, but when you're under the age of 18, it's all the more difficult, as evidenced by this worthwhile documentary series, which wraps up its first season. The 90-minute finale follows Amber and Maci as they celebrate their babies' first birthdays, a milestone not only for the little ones but also for the young women who've grown tremendously over the course of the season. And is Catelynn ready to take that next step with her boyfriend Tyler? We'll find out when he pops the question. — Karen Andzejewicz