NFL (6:30 p.m., ESPN): Ravens at Steelers
Big Bang Theory (7 p.m., Ch. 2): Leonard dates Sheldon's enemy.
Dancing with the Stars (7 p.m., Ch. 4): The remaining teams perform.
Terminator: Sara Connor Chronicles (7 p.m., Ch. 13): Cameron forgets who she is.
Gossip Girl (7 p.m., Ch. 30): Blair sabotages her mom's fashion show.
How I Met Your Mother (7:30 p.m., Ch. 2): Marshall meets Regis Philbin.
Two and a Half Men (8 p.m., Ch. 2): Alan lends Charlie money.
Heroes (8 p.m., Ch. 5): Villains take hostages.
CSI: Miami (9 p.m., Ch. 2): The high price of gas leads to murder.
Boston Legal (9 p.m., Ch. 4): Alan sues a drug company for deceptive advertising.
Life (9 p.m., Ch. 5): Three trunks containing dead bodies are found. (Season premiere)