Today on TV

NFL (6:30 p.m., ESPN): Minnesota Vikings at New Orleans Saints

Big Bang Theory (7 p.m., Ch. 2): Sheldon introduces Penny to online gambling, and she quickly gets addicted to it.

Dancing With the Stars (7 p.m., Ch. 4): The remaining pairs perform in this two-hour episode. (See accompanying story.)

Chuck (7 p.m., Ch. 5): Chuck has to learn the art of seduction.

Terminator: Sarah Connor Chronicles (7 p.m., Ch. 13): John and Derek infiltrate a military academy to protect a member of the future resistance.

How I Met Your Mother (7:30 p.m., Ch. 2): Stella assumes that she and Ted will move to New Jersey.

Two and a Half Men (8 p.m., Ch. 2): Alan dates two women at once.

Raising the Bar (8 p.m., TNT): Jerry's client is charged with stealing from a hit-and-run driver.

Heroes (9 p.m., Ch. 5): HRG searches for a way to get rid of Sylar.

Worst Week (8:30 p.m., Ch. 2): Sam's friend is smitten with Melanie's sister.

CSI: Miami (9 p.m., Ch. 2): The daughter of Delko's therapist is murdered.

Boston Legal (9 p.m., Ch. 4): Denny shoots somebody. Again.

Life (9 p.m., Ch. 5): A frozen body is found.