Today on TV

NFL (6:30 p.m., ESPN): Green Bay at Minnesota

How I Met Your Mother (7 p.m., Ch. 2): Robin thinks that Barney is cheating on her.

Dancing With the Stars (7 p.m., Ch. 4): The competition continues.

Heroes (7 p.m., Ch. 5): Terminally ill Hiro focuses on saving the lives of others.

House (7 p.m., Ch. 13): The team treats a controversial African leader.

Accidentally on Purpose (7:30 p.m., Ch. 2): An unfortunate incident forces Zack to reject Billie's advances.

Two and a Half Men (8 p.m., Ch. 2): Jake blackmails Charlie.

Trauma (8 p.m., Ch. 5): A car crashes into a street fair.

Lie to Me (8 p.m., Ch. 13): A college football player is accused of statutory rape; Loker and Foster try to determine if a religious group is actually a cult.

Gossip Girl (8 p.m., Ch. 30): A movie star (Hilary Duff) is assigned as Vanessa's roommate at NYU.

Big Bang Theory (8:30 p.m., Ch. 2): Sheldon tries chocolate-based behavior modification on Penny.

CSI: Miami (9 p.m., Ch. 2): Three volleyball players suddenly drop dead on the court.

Castle (9:02 p.m., Ch. 4): Castle and Beckett investigate the brutal murder of a young model during Fashion Week.