Today on TV

NCIS (7 p.m., Ch. 2): The investigation into a Navy lieutenant's suicide leads in a dangerous direction.

House (7 p.m., Ch. 13): House digs up more dirt on everyone on his team.

90210 (7 p.m., Ch. 30): A producer offers Angie a chance to audition.

The Mentalist (8 p.m., Ch. 2): A waitress is murdered.

Dancing With the Stars (8 p.m., Ch. 4): Another pair is eliminated.

P.O.V. (8 p.m., Ch. 7): Critical Condition follows four critically ill Americans who have no health insurance. The issues raised are discussed in Rx for Change (9:30 p.m., Ch. 7).

Fringe (8 p.m., Ch. 13): There's a deadly construction site explosion.

Privileged (8 p.m., Ch. 30): Megan learns about Rose's past.

Without a Trace (9 p.m., Ch. 2): An executive is kidnapped.

Law & Order: SVU (9 p.m., Ch. 5): A boy disappears.

The IT Crowd (8 p.m., IFC): This hilarious, award-winning British comedy about the I.T. (information technology) guys at a large corporation makes its American debut.

The Shield (11 p.m., FX): An old nemesis confronts Claudette.