Wolowitz struggles with moving out of his mother's house. Meanwhile, Sheldon is caught in the middle of an argument between Amy and Wil Wheaton.

Team One gets involved when ex-soldiers take over an armored truck carrying more than two million dollars.

Stefan and Klaus form an uneasy alliance to try and contain the danger that Connor has unleashed on the town. When Connor takes Jeremy, Matt and April hostage at the Grill, Stefan and Damon have a serious disagreement about the best course of action, and Elena is again caught between the two brothers. The situation quickly turns violent when Klaus sends one of his hybrids, Dean to stand up to Connor. Caroline is surprised to find Hayley at the Lockwood mansion. Meanwhile, Professor Shane works with Bonnie to help her get past her fear and guilt.

Results night and Demi Lovato and the Young Adults: Paige Thomas, Jennel Garcia and CeCe Frey, L.A. Reid and The Over 25s: Vino Alan, Tate Stevens and Jason Brock, Simon Cowell and the Groups: "Lyric145", "Fifth Harmony" and "Emblem3" and Britney Spears and the Teens: Arin Ray, Beatrice Miller, Carly Rose Sonenclar and Diamond White wait to see if they did enough. Special Musical Guest: "One Direction".

The votes are revealed, and the coaches make their saves as the field dwindles to 12 artists.

The crew is hit with an attack by an unknown force unlike anything they've seen before. As confusion and aggression take hold, Marcus and Sam can no longer trust their own senses even as they race to save the sub and defend the island.

Tired of the complications of a traditional relationship, Walden hires an actress to play the part of his girlfriend. Meanwhile, Jake and Missi plan a rendezvous at the beach house.

In this Meredith & Cristina-centric episode, the two friends continue to cope with life after the plane crash and their ever-growing responsibilities at their respective hospitals. As Meredith juggles taking care of Zola with a case that hits close to home, Cristina assists Dr. Thomas on a challenging heart surgery.

Money problems plague Andy's family. Meanwhile, Dwight guests on a local radio show, so the staffers harass him with outrageous phone calls; and Kevin unearths a big secret about Oscar.

After finding themselves stranded in Panama, Michael and the team are forced to hijack a plane in order to get home. Before they can leave, however, Michael must first escape the clutches of a sadistic Panamanian drug-runner.

The school production of "Grease" is underway and Marley, Jake, Kitty and football player Ryder compete to play "Danny" and "Sandy". Meanwhile, former glee clubbers Mercedes and Mike, return to cast the play and Mr. Schuester struggles with a difficult decision.

The Machine's newest Number points to a hardware store owner living in the suburbs. When Reese goes undercover, he soon discovers that the man is hiding a dark secret from his past.

The clothiers join forces with graffiti artists to create wearable art featuring spray paint. Guest judges: Robert Tagliapietra and Jeffrey Costello.

Vincent is captured on a convenience store surveillance video while preventing a robbery, and Cat warns him to be extra careful when his photo appears in the newspaper. Cat and Tess investigate the disappearance of a woman named Amy, who has gone missing after her fiancee, Dr. Michael Walters, surprised his bride-to-be by placing their engagement announcement in the paper that morning. Evan runs Amy's fingerprints and discovers her true identity, while Cat wonders if her disappearance was intentional after Vincent mentions that he and JT have an escape plan to clear out of their loft without a trace in a matter of minutes. Later, Michael also goes missing and Joe learns that his team has been deceived. Meanwhile, Heather is planning a surprise birthday party for her sister, forcing Cat to postpone her birthday plans with Vincent. At the party, Cat and Evan share a surprising moment.

After being warned about Ben's divorced parents, Leslie gets nervous as she prepares to meet them. With the help of Jean-Ralphio, Tom prepares to pitch his new business to Ron. Meanwhile, Chris rides an emotional rollercoaster.

The Gang gets Freudian as they step into the therapist's office to work through their mountain of issues, but when Dennis thinks he has everyone figured out, the shrink turns the tables on him and exposes the insanity in his unique brand of pop psychology.

Fiona is surprised by a visit from a smuggler she met in prison who needs her help bringing down a corrupt Miami detective. Meanwhile, Michael teams up with a former adversary in order to turn the tables on a more treacherous foe.

Sammi confronts Deena about her antics; Mike and the roommates learn about Paula's wild side.

When the wife of a governor is raped, the governor takes the law into his own hands and then asks Olivia and her team to come in and clean up his mess. Meanwhile, both Cyrus and the President are caught off-guard when Cyrus' husband, James, decides to return to his career as a journalist covering the White House.

Sherlock tries to prove that one of people whose body was found in the wreckage of a small plane crash was actually killed before the plane went down. Meanwhile, Watson tries to convince Sherlock to meet with his elusive father.

Kevin decides to run for judge and ends up at a charity event with Bills Quarterback Ryan Fitzpatrick. The guys take an intelligence test to decide who's the smartest. Andre refuses to believe he's balding.

Katie Dellamaggiore & Pobo Efekoro

Javier Bardem, Lauren Cohan, Brandi Carlile

Kevin Sheppard

Robin Williams, Lianne La Havas

Sally Field, Chris Matthews, Lord Huron

Sy succumbs to pressure and allows a wounded Mafia kingpin to be admitted. Detective Briggs changes vocations. Chief has a day off.

The NTSF gang show off their home security system and iPhone app.

LL Cool J, Naomie Harris

Julie is pleased after Gavin's search for Lorraine's replacement comes up with a surprising result. A disillusioned Andy decides to apply for another job.

Damian Lewis is this week's guest host and the panelists are Nigel Farage and Harry Shearer.

Tom hosts a dinner for Gemma who shows up with an uninvited guest. Much to the annoyance of a lovelorn Jason, Inca goes on a blind date at the bar where she inadvertently gives Billy some advice about love that forces him to finally confront Gemma.

It's a family affair as Jamie is joined by father and former Spurs manager Harry Redknapp. Johnny Vegas and presenter Charlotte Jackson are also in the studio.

Australian TV presenter and comedienne Julia Zemiro makes her debut on the obscure general knowledge quiz, joining Sue Perkins, Ross Noble and regular panellist Alan Davies to answer Stephen Fry's fiendish questions on the theme of jeopardy.

Graham is joined on the show by Bradley Wiggins, Cameron Diaz, Sarah Millican and Rod Stewart.