What's New Tonight: Thursday, April 18th.

8:00 PM EST:

“American Idol” on FOX. Results episode. One finalist is eliminated. Featuring performances by Fantasia and Clay Aiken.

“The Vampire Diaries” on The CW. Damon and Stefan try their best to help Elena by going to the prom, but no one had anticipated her sudden outburst. Caroline turns to Klaus for comfort after blaming Elena for ruining her perfect prom plans. Elijah has a challenge for Rebekah.

9:00 PM EST:

“Anger Management” on FX. Charlie upsets his neighbors by bringing his clients to his home.

“Beauty and the Beast” on The CW. Evan admits to tipping off Muirfield about Vincent’s location. Gabe finds evidence that points to a Mole in the department.

“Glee” on FOX. In New York, Rachel auditions for the Broadway revival of “Funny Girl”. Back at home, the New Directions prepare for their Regionals competition, which they learn has a “Dreams” theme.

“The First 48” on A&E. A man in Dallas is gunned down as he tries to protect his friends.

“Project Runway” on LIFE. Season 11 Finale (Part 1). The final four journey back home to work on their final collections. They all receive surprise visits by their fashion mentor Tim Gunn before returning to New York and presenting their lines to the judges.

10:00 PM EST:

“Hannibal” on NBC. Will and Jack hurry to stop a murderer who has been harvesting victim’s organs while they’re still alive.

“Men at Work” on TBS. The guys try to impress the new editor. Neal gets a boost in his confidence, things get iffy for Gibbs, and Milo just wants to be noticed. Tyler tries a new approach to his dating style.