What's New Tonight: Thursday, April 25th.

8:00 PM EST:

“The Big Bang Theory” on CBS. Amy tries to help Sheldon get over his need for closure after one of his favorite shows is canceled. Raj learns a secret about Lucy.

“American Idol” on FOX. Results episode. One of the final four is eliminated.

“The Vampire Diaries” on The CW. Klaus travels back to New Orleans and learns about a plot against him. He reunites with a former friend who controls the citizens of the city. Hayley falls under the spell of a witch in the French Quarter. Katherine discloses a shocking vulnerability to Rebekah.

9:00 PM EST:

“Beauty and the Beast” on The CW. Gabe reveals that he knows about Muirfield. J.T. and Vincent find a place to live.

“Glee” on FOX. The members of New Directions perform acoustic songs after the power at the high school goes out. In New York, Isabelle Wright asks Kurt to volunteer at a charity event for Vogue.

“Grey’s Anatomy” on ABC. Board members are unsure how to address the CDC’s investigation of Bailey. Cristina teases Alex about his feelings for Jo. Owen continues to care for Ethan as he waits for his parents to improve.

10:00 PM EST:

“Elementary” on CBS. Sherlock tries to find the accomplice of a murdered blackmailer. Sherlock refuses to celebrate his first year of sobriety.

“Hannibal” on NBC. Will tracks down a serial killer. Hannibal tries to drive Jack and Will apart. Jack’s wife hires Hannibal as her new therapist. Beverly attempts to bond with Will.

“Scandal” on ABC. Details about Huck’s background are revealed. Olivia and Fitz have an important conversation, but fail to check if they are being watched. Cyrus has doubts about Jake. Mellie makes a choice that may have horrible repercussions.