Today on TV

NCAA men's basketball tournament: Purdue vs. Connecticut (5 p.m., Ch. 2); Duke vs. Villanova (7:30 p.m., Ch. 2)

My Name Is Earl (7 p.m., Ch. 5): Randy recalls his first love.

American Idol (7 p.m., Ch. 13): The results of this week's voting are announced — will Utahn Megan Joy Corkrey survive to sing again?

Samantha Who? (7:30 p.m., Ch. 4): Todd and Samantha go on a double date with Andrea and Tony. (The show moves to its new night and time this week.)

Grey's Anatomy (8 p.m., Ch. 4): Izzie undergoes dangerous surgery.

The Office (8 p.m., Ch. 5): Michael isn't getting along with the new vice president.

Supernatural (8 p.m., Ch. 30): In an episode titled "It's a Terrible Life," Sam and Dean see what their lives would have been like if they weren't demon hunters.

30 Rock (8:30 p.m., Ch. 5): Jack plans his 50th birthday party.

Private Practice (9:02 p.m., Ch. 4): Violet is jealous when Pete begins dating a single mother.

ER (9 p.m., Ch. 5): In the second-to-last episode, the doctors and nurses help out at a camp for kids who have had open heart surgery.