Glee (8pm, Fox) - In the Season 3 premiere, the glee kids are depressed following their disappointing showing at Regionals, so Will assigns them a project to get them back on track. Also, Sue Sylvester is running for Congress.
Biggest Loser (8pm, NBC) - For the Season 12 premiere, new contestants are grouped by age and must choose their trainer. Tennis star Anna Kournikova and Dolvett Quince join Bob Harper to make up the trio of trainers.
NCIS (8pm, CBS) - In the ninth season opener, Tony's secret assignment for the SECNAV leads to an NCIS agent's death and leaves Tony and Gibbs to solve the mystery of how the tragedy occurred.
Dancing with the Stars (8pm, ABC) - Harry Connick Jr will perform on tonight's results show. A dancer will be eliminated.
NCIS: Los Angeles (9pm, CBS) - In the Season 3 opener, the team searches for Hetty in Romania, and Callen learns something new about his past.
New Girl (9pm, Fox) - After a bad breakup, goofy Jess Day (Zooey Deschanel) moves in with three single guys. Is it as good as we all want it to be?
Raising Hope (9:30pm, Fox) - In the second season premiere, Jimmy is surprised to learn that he was once a talented singer until an accident involving a golf club shattered his dreams, so he enlists his family to help him get his creative juices flowing again. Pop singer Greyson Chance guest stars as a teenage Jimmy.
Unforgettable (10pm, CBS) - A new show about a former detective (Poppy Montgomery) with a flawless memory consults on homicide cases. In the opener, Carrie helps New York police investigate her neighbor's murder. Adrienne's take.
Body of Proof (10pm, ABC) - In the Season 2 premiere, Megan's investigation into the death of a middle-aged man whose car plunged over an embankment leads her to a "Desperate Housewives" type cul-de-sac that's loaded with suspects.