The Results are in and the Top 4: Kree Harrison, Candice Glover, Angie Miller and Amber Holcomb wait for their results. There is a twist that will affect the judges and contestants. Musical Guests: Stefano Langone and Lee DeWyze

Leonard tries to get Penny as excited about Buffy the Vampire Slayer as he is. Amy tries to get Sheldon to stop having to finish things by starting various things and not letting him finish them. Raj finds Lucy's blog mentioning that he is somewhat feminine.

Acting on a mysterious tip that a plot is brewing against him in New Orleans, Klaus makes a trip to the town he and his family helped build. Klaus' questions lead him to a reunion with his former protégé, Marcel, a charismatic vampire who has total control over the human and supernatural inhabitants of New Orleans. Determined to help his brother find redemption, Elijah follows Klaus and soon learns that Hayley has also come to the French Quarter searching for clues to her family history, and has fallen into the hands of a powerful witch named Sophie. Meanwhile, in Mystic Falls, Damon and Stefan continue with their plan for Elena, while Katherine reveals a surprising vulnerability to Rebekah and asks her to deliver a message.

When Annie and Shirley learn that Leonard is actually holding the spot as the class valedictorian, they join forces to bring him down. Meanwhile, Troy and Abed reminisce about one of their favorite body switching films and when they inadvertently re-enact a critical scene, things start becoming a little funky at Greendale.

Alan's world spirals downward when Lyndsey decides their relationship is over. Walden looks for a solution to free himself from being the sole person in Alan's life.

Budget-cut proposals submitted by Ron would close down the local minigolf course, which Leslie deems unacceptable. Elsewhere, Andy and Ben celebrate a big donation made to their charity, and Ann tries to solve Tom's girlfriend troubles.

Bailey finds herself at the center of a CDC investigation surrounding the death of several of her patients, as Jackson and the rest of the board members argue over how to address the crisis with the public. Meanwhile, Cristina teases Alex about his unspoken feelings for Jo, and Owen continues to take special care of Ethan as the condition of his parents remains uncertain.

Dwight and Angela participate in a paper airplane contest and compete against each other. Meanwhile, Andy prepares for a potential acting job, and Jim and Pam utilize new skills.

When the power goes out at McKinley High, Will and Finn enlist the members of New Directions to "unplug" and perform acoustic numbers. Meanwhile, Isabelle Wright asks Kurt to volunteer at the Vogue.com charity event, with Rachel and Santana in tow

Reese and Carter are both racing against the clock. While Reese tries to help a doctor get revenge on the man who gave him a slow-acting incurable poison, Carter must take a stand when IAB goes after Fusco for the murder of his partner, Stills.

The winner is named in the conclusion of the two-part Season 11 finale. Michael Kors is the guest judge.

Gabe comes clean to Cat that he knows about Muirfield. Vincent does not think Cat should trust Gabe and is suspicious of his intentions, which causes tension between them. Meanwhile, JT and Vincent finally find a new place to live.

Halfway through the toughest alligator season in decades, the battle-weary veterans need their deckhands to step up like never before. In a desperate plea for help, one swamper reaches out to an unlikely family member who is terrified of being in the boat. Another veteran struggles to harness the raw talent of his teenage deckhand–while another team hashes out the value of intuition over discipline.

Charlie inadvertently puts two patients in his group together in a romantic relationship.

Secrets from Huck's life before Pope and Associates are revealed, Olivia and Fitz engage in an emotionally charged conversation, unaware of the fact that someone could be watching, and Olivia's team comes together to help one of their own. Meanwhile, Cyrus is becoming increasingly skeptical of Jake, and Mellie makes a decision that could bring down the White House

Gibbs reluctantly falls into puppy love. Milo gets caught up in a relationship that is moving too fast for everyone to handle. And Neal teaches Tyler a lesson about the perfect hamburger.

Sherlock and Joan hunt for the accomplice of a murdered blackmailer who targeted families of rape victims. Meanwhile, Sherlock resists celebrating his first year of sobriety.

Will Graham and the BAU team track a serial killer whose bloody ritual includes cutting the victims' back flesh and stretching it to look like angel wings. Returning to the field weighs heavily on Will's psyche and Hannibal tries to drive a wedge between Will and Jack. Meanwhile, Jack Crawford's wife Bella pulls away from him and begins seeing Hannibal as her therapist, in an effort to come to terms with the fact she is dying. Beverly tries to connect with Will on a more personal level.

Detectives Flynn and Vega investigate the murder of a controversial and outspoken priest.

Sen. Joe Manchin

Bishop Gene Robinson

Dwayne Johnson, Snoop Lion

Gwyneth Paltrow, JB Smoove, Billy Ray Cyrus

Zac Efron, Anna Quindlen

Ray Winstone hosts this week, with Reginald D Hunter and Camilla Long as the guest panelists.

Determined to put a stop to Lucy flirting at an Annual Trade Conference in order to get work, Lee takes evasive action.

Together on Graham's sofa are Formula 1 ace Lewis Hamilton, comedian Dara O Briain, film director Pedro Almodovar and singer Alison Moyet.