Today on TV

• NCIS (7 p.m., Ch. 2): Tony and Kate are exposed to a deadly biohazard.

• Nova (7 p.m., Ch. 7): Exploring the "Secret of the Crocodile Caves."

• American Idol (7 p.m., Ch. 13): The four remaining contestants perform.

• Gilmore Girls (7 p.m., Ch. 30): Rory gets a job review from Logan's father; Sookie goes into labor.

• Scrubs (8 p.m., Ch. 5): Their residency at an end, the gang has some big decisions to make — J.D. considers moving out and living on his own; Turk and Carla consider a big change; and Elliott considers a job offer.

• House (8 p.m., Ch. 13): Rumors run rampant about House's impending date with Cameron.

• Will & Grace (8:30 p.m., Ch. 5): It's a new episode, NOT a rerun. After a near-death experience, Grace asks Will to write her will — and she gets a surprise from Will's mother.

• Blind Justice (9 p.m., Ch. 4): Dunbar goes undercover as a drug dealer.

• Law & Order: SVU (9 p.m., Ch. 5): Drug-related crimes turn into a case of elder abuse.

• Independent Lens (11:15 p.m., Ch. 7): A profile of Imelda Marcos.