* Are You Smarter Than a 5th Grader? (8/7c CMT)
It might be Thanksgiving break for most students, but the kids in this classroom are still hard at work. Tonight's contestant, Sanjaya Malakar, is no stranger to reality TV: He's a well-known and controversial contestant from Season 6 of American Idol. He's famous for creating the "ponyhawk" hairstyle and for being, according to Idol judge Randy Jackson, one of the smartest contestants to appear on the musical reality show. OK, Randy, but can he handle fifth-grade geography?
It's the beginning of the end for Mr. Monk and the gang as the first part of the series' two-part finale airs tonight. Monk responds to a call that leads him to the location where he first heard about Trudy's murder. His return there sparks a flurry of activity as he sets out to solve the most important case of his career.
* Ugly Betty (9/8c ABC)
We've already seen how hard it is for Betty to temper her urge to intervene on Daniel's behalf this season, and it has to sting that Natalie (Jamie-Lynn Sigler) has been hogging all of his attention. But tonight Betty believes he's reached the point of no return with his devotion to the Community of the Phoenix - which even Amanda mocked as a bunch of hogwash - and hatches a plan with Claire, Matt and Amanda to shock him back to reality once and for all.
* Storytellers (11/10c VH1)
Foo Fighters perform and discuss the inspiration behind their songs. The repertoire in this concert from Culver City, Calif., includes "Big Me," "Everlong," "My Hero" and "Wheels," which was written while the band was on tour. Another song written while on tour is "Word Forward," which front man Dave Grohl, looking like a young Bob Seger with his long hair and dark beard, says was inspired by the death of a close childhood friend who helped him discover music. Its message, Grohl explains, is that "that part of my life is over...and I just have to move on."
* Diners, Drive-Ins and Dives (10/9c Food Network)
In seven seasons, Guy Fieri has visited hundreds of America's best greasy-spoon joints, indulging in a diet that would make a nutritionist shudder. Now he's returning to the most "off the hook" spots he's visited on his never-ending road trip, including one Texas eatery where diners can get their cars and clothes washed while enjoying their world-class lamb burgers.