8 p.m., FOXEllen DeGeneres to make her debut as the fourth judge. Who cares about the Top 24? I want to see Ellen and Simon snark it up.
9 p.m., CNBC
Business Model: Inside the Sports Illustrated Swimsuit IssueLearn about the business behind SI's most famous issue of the year, see how photo shoots are set up, hear from models about the scouting process—oh yeah, and enjoy some scantily-clad eye candy while you're at it. If this special isn't enough, you can always watch David Letterman unveil this year's cover on the Late Show at 11:35 p.m. on CBS.
9 p.m., ABCEvangeline Lilly) is on the run, as usual, and Jack (Matthew Fox) puts a friend's life in danger.
Series premiere, 9 p.m., FOXNicholas Bishop) team up to help people deal with traumatic events from their "past lives." In the premiere, a teenager remembers an abduction-murder from his past life.
10 p.m., ABCElisha Cuthbert!) and a mysterious new case that takes them into the world of parkour. Too bad Slater wasn't on that episode of The Office instead.
10 p.m., A&E;
Also on the airwaves...
NCIS, 8 p.m., CBS
The Biggest Loser, 8 p.m., NBC
NCIS: Los Angeles, 9 p.m., CBS
The Good Wife, 10 p.m., CBS
Wild Recon, 10 p.m., ANIMAL
The Michael Vick Project, 10 p.m., BET
Millionaire Matchmaker, 10 p.m., BRAVO
White Collar, 10 p.m., USA
Paranormal Cops, 10:30 p.m.
NCAA Men's Basketball: Michigan State v. Purdue, Alabama v. Kentucky, Tennessee v. Vanderbilt, Georgetown v. Providence, Virginia Commonwealth v. George Mason
What are you watching tonight?
Follow TV.com writer Stefanie Lee on Twitter: @StefAtTVDotCom