The tough Hollywood Round continues, as judges Mariah Carey, Randy Jackson, Nicki Minaj and Keith Urban narrow down the contestants. Some will leave with shattered dreams, others will move on in the competition.

When Sheldon and Leonard fight, it affects Penny and Amy's living arrangements. Meanwhile, Raj takes care of Mrs. Wolowitz while Howard is away.

Shane leads an expedition to a desolate island off the coast of Nova Scotia, where he believes the secret of the cure lies hidden. On the trek to the island's interior, Rebekah and Elena continue their bitter rivalry, Stefan does his best to keep the peace, and Damon accuses Shane of leading them into a trap. Bonnie and Jeremy try to figure out the message of the Hunter's mark, while Shane reveals more of the legend of Silas and the witch Qetsiyah, along with his own personal history. Back in Mystic Falls, Tyler confronts Klaus, and Caroline is caught up in the violence that follows.

The Study Group returns from summer break ready to tackle their fourth year of Community College. Jeff is particularly focused on graduating and is just a few credits away. When there is a mix-up with a history class registration, Dean Pelton institutes an elaborate physical competition for class space. Meanwhile, Britta helps Abed deal with the anxiety he is experiencing over the thought of the study group graduating and breaking up.

Alan has concerns when Jake brings his 36-year-old girlfriend home for a visit. Meanwhile, Walden tries to keep a secret from Alan.

After several unsuccessful relationships Ann makes a dramatic life decision. Ben enlists the help of Chris, Tom and Ron to choose a caterer for the wedding, while April has to handle one of Leslie's usual tasks.

Competition heats up as several of the doctors fight to become the new face of Seattle Grace; April brings in an emergency case, and Jackson and Alex work with a transgender teen couple. Meanwhile, the hospital implements new policies which test the patience of the staff.

The staffers pair up as faux couples to score a Valentine's Day discount at a mall. Elsewhere, Erin tells Pete that she'll break up with Andy when he returns, yet Pete has his doubts. Also: Jim and Pam socialize with the documentary's soundman.

Finn challenges the glee club to find their inner powerhouses for "Diva Week". Meanwhile, in New York, Kurt can no longer take Rachel's arrogant attitude and calls her out, causing tension between the two friends. Also, Emma is in a whirlwind preparing for her upcoming wedding.

The team's new Number is a self-centered muli-million dollar web developer whose erratic behavior makes it impossible for Reese to follow him. Since he can't beat him, Reese joins him, but soon discovers that he and Finch have been compromised.

The outfitters are tasked to design garments for host Heidi Klum for the launch of her new fragrance line. Guest judge: Kristin Davis.

Cat suspects Muirfield might know Vincent's whereabouts and in spite of her vow to go cold turkey, she is forced to interrupt his romantic cabin getaway with Alex in order to save their lives. Meanwhile, Evan finds a bug in his lab and becomes increasingly suspicious of J.T..

Jennifer moves in with Charlie temporarily and Kate gets jealous.

President Dale Gilchrist is forced to deal with a group of angry protesters after Skip's attempt to quell the situation goes awry. Emily tries to form a closer relationship with Xander, by helping him campaign for student body President. Elsewhere, Becca has a hard time coping with her future.

The guys host a taste test with uncomfortable survey questions afterward, negotiate for worthless items at a flea market and work as attendants at a gas station.

A grueling Nerd War superhero debate leads to a controversial call by a panel of guest judges. Then the Nerd-Off is all about superhero trivia, forcing the self-proclaimed superhero expert to prove herself or get left in the rubble.

The beginning of beautiful hatred between Archer and his new stepfather plays out as the two are chased by gangsters.

With the resources of the firm stretched to the limit, Daniel Hardman returns with an outrageous lawsuit against Jessica.

As David uncovers the truth about the Cytron case, things come to a head for Olivia, Cyrus, Mellie, Hollis and Verna. Backed into a corner, the five conspirators go to extremes and, in some cases, unconscionable lengths to protect themselves and/or the ones they love.

Sherlock tries to find out who kidnapped the adult daughter of his ex-drug dealer, Rhys. Watson worries about Sherlock's sobriety when Rhys suggests Sherlock was a better detective when he was using drugs.

Jason, furious over Ian's out of control spending, cuts off his cash flow? only to wake up at the wheel of a "borrowed" sports car with a trunk full of money and an angry drug dealer in his rearview mirror. Meanwhile, Jason and Lena have a falling out over Jason's questionable conduct, which prompts Ian to make a dangerous after-hours visit to Lena. Dr. Kenneth Jordan is also growing suspicious of Jason's odd behavior, and demands answers from Jason's confidante, Dr. Ruben Marcado. And Olivia fears her son's new imaginary friend is not so imaginary after all.

In an effort to do something nice for Steve, Jim invites him along to a gig in Omaha - but once they get on the plane Jim gets embroiled in a battle with another passenger about plane etiquette and a middle seat.

Neil Barofsky

Chris Tucker, Darryl Lenox

Behn Zeitlin

Sally Field, Elvis tribute artist Shawn Klush

Amy Adams, Adam Carolla, Hunter Hayes

Amanda Peet, Paul Williams

Nikki, Jack and Leo struggle to identify the human remains with only sections of skeleton found and basic forensic facilities, but believe Dan Lambert must have been captured by the Taliban, executed and buried. Whilst Leo grows closer to charity worker Fawzia, Nikki and Jack find and assemble the skull fragments and make an unnerving discovery that challenges their theory of what happened to Dan Lambert. However, when an imprisoned Taliban fighter is found dead in the compound, the team suspect he was murdered, and suspicions grow about Sean Nugent and his men's treatment of prisoners. No longer able to trust anyone, the increasingly isolated team doggedly piece together the circumstances surrounding Dan Lambert's disappearance, but the shocking truth triggers a chain of events which leaves everyone's lives in danger.

Jimmy Carr returns with the irreverent panel show, in which team captains Sean Lock and Jon Richardson are joined by Tess Daly, Stephen Mangan, Kian Egan and Tony Law.

In this edition, Rafe Spall joins Adam Hills alongside co-hosts Josh Widdicombe and Alex Brooker to provide some alternative commentary on the significant moments of the past seven days.

Graham is joined on the show by Mark Wahlberg and Sarah Silverman.