Today on TV

NFL (6:30 p.m., ESPN): Bucs at Panthers

The Big Bang Theory (7 p.m., Ch. 2): Leonard turns to Penny for relationship advice.

A Charlie Brown Christmas (7 p.m., Ch. 4): Classic animation. (R)

Chuck (7 p.m., Ch. 5): Chuck spies on Sarah.

Terminator: The Sarah Connor Chronicles (7 p.m., Ch. 13): Jesse's life hangs by a thread.

How I Met Your Mother (7:30 p.m., Ch. 2): Ted and Barney pick a fight.

Two and a Half Men (8 p.m., Ch. 2): Evelyn offers to pay for Jake's college education.

Boston Legal (8 and 9 p.m., Ch. 4): In the final two episodes of this series, Alan argues a case before the Supreme Court; Shirley and Carl plan their wedding; and the firm faces financial collapse. Once upon a time, the end of this show would have been an occasion to mourn. At this point, its demise is somewhat past due.

Heroes (8 p.m., Ch. 5): Sylar tries to save Arthur from Peter.

Privileged (8 p.m., Ch. 30): Megan's mother suddenly reappears.

CSI: Miami (9 p.m., Ch. 2): Horatio looks into Delko's past.