One singer is eliminated. Performing: Carrie Underwood and Coldplay.

NASA reschedules Howard's mission, putting the wedding plans in jeopardy. Meanwhile, Leonard says something surprising to Penny in the bedroom.

Klaus acts on his intentions to leave town with Elena, but finds resistance from a surprising new enemy. Bonnie calls on Abby to help her with a difficult spell. As events spiral out of control, Elena is determined to protect Caroline, Damon and Stefan enlist Tyler's help, while Bonnie and Jeremy take a terrifying risk to make sure her spell is effective. Damon and Stefan have a surprisingly candid conversation about the future.

As the study group comes to terms with the death of a beloved classmate, Jeff easily adjusts, while Britta acts as grief counselor to the rest, employing what she's learned in her psychology class. Meanwhile, Chang is on a mission to increase his policing powers at the school and when the memorial service disintegrates into a riot, he seizes the opportunity to take more control over campus security.

As Giancarlo and Becca race to find Azimoff , Violet and Dax try to apprehend Becca; an enemy is revealed.

The launch of Angie Jordan's new clothing line brings "Queen of Jordan" back to "TGS", but the cameras focus on Jack when news about his wife, Avery, forces him to confront his feelings for Diana. Meanwhile, Liz finds herself in a feud with the reality show's youngest cast member.

When Audrey and Jen makes plans to see a concert, Jeff makes solo plans and excludes Adam, whose feelings are hurt.

Leslie goes on a bus tour for the final day of her campaign, and is caught off guard when an important person in Pawnee passes away. Meanwhile, Andy susses out a security threat, and Chris finds an unlikely cure for his depression.

The residents agonize over their oral boards, reliving every answer they gave during their exams; Arizona's close childhood friend comes to Seattle Grace for medical help; the doctors work on a patient who is missing one third of his skull; and Julia asks Mark to start a family with her. Meanwhile Catherine tells Richard that one of his residents has failed.

Andy gears up for his comeback at Dunder Mifflin. Meanwhile, a boozy Robert California closes a nearby branch, creating a turf war when Jim and Dwight are pitted against another salesman.

It's Prom night in Chance Harbor and after Adam uncloaks a crystal hidden in the school, Blackwell tells Cassie she can use her dark magic to find it. When Cassie follows this advice, it leads her to a dangerous discovery. Meanwhile, Faye invites Jake to Prom, despite the fact that he stood her up two years earlier. Adam, Diana, Cassie and Melissa finally make it to Prom but when they lose the crystal to Eben, they end up in a life and death situation. Meanwhile, Dawn attempts to stop Blackwell, who casts a deadly spell on Charles.

Finch tries to keep Reese off of a case by giving him his birthday off, but Reese soon learns about it anyway and realizes it related to a personal incident in his life.

Following numbers from Jake, Martin helps reunite a French woman with her biological mother and twin sister, then he attempts to find the person responsible for their estrangement. In the meantime, a superstitious young Italian woman is fretting when her astronaut husband loses contact with earth.

Troy receives help from his family while filling tags in Pierre Part; Austyn and Blake are presented with a difficult challenge; and Bruce uses a rotten chicken as bait.

Season 1 concludes with the guys using bizarre props to toy with customers at a candy store and thumbing their noses at proper elevator etiquette.

Nick Cannon is the guest host. Prank victims include New Boyz, Ashley Tisdale and Demi Lovato.

While investigating the murder of a surfer, Lisbon reconnects with her former fiancé, Kenny Johnson, who she hasn't seen in over a decade. Also, Cho questions his decision to be in a relationship with Summer.

Detective Britten and Bird look into what appears to be a case of gang violence, but clues from his other reality force him to look a little closer. Meanwhile, Hannah uses her intuition to talk through a tough situation with Rex's girlfriend Emma. Later, Captain Harper finds herself having to take back a promise and Detective Vega is planning Britten's going away party.

After a commercial plane crashes, taking the lives of all onboard, Olivia Pope and her "gladiators-in-suits" must defend the pilot from media and airline accusations; meanwhile, when Amanda Tanner goes missing, Huck calls upon his dark past to find her whereabouts, and Fitz seeks the help of the Vice President in order to pass key legislation despite their icy relationship.

Peter Bergen

Lena Dunham

Stephen Colbert, Chloe Grace Moretz, a performance by the Broadway cast of "Nice Work If You Can Get It"

Robert Downey Jr., Katharine McPhee, Toast to Freedom

Julie Andrews, Michael Emerson

The carnival is in town. Innocent fun turns to horror when one of the sideshow acts is murdered. Phryne poses as the magician's assistant, Fern, to investigate. The heady atmosphere of the carnival takes Phryne on a bittersweet trip down memory lane - to the days when she and her sister, Janey, would sneak into the big top, until one night Janey disappeared. Her pain is reignited when she discovers that Murdoch Foyle - the man accused of murdering her sister - was the mastermind behind an elaborate prison escape plan. Any chance of discovering the truth about her sister's fate is dashed though, when she learns that Foyle has died and been cremated.

Rob Brydon hosts the comedy panel show. Lee Mack is joined by Des O'Connor CBE and Tess Daly, while David Mitchell is joined by Rhod Gilbert and Sally Phillips.

Top Gear presenter Jeremy Clarkson guest-hosts the satirical current affairs quiz, with regular team captains Ian Hislop and Paul Merton joined by celebrity panellists Kevin Bridges and Nancy Dell'Olio to poke fun at the weeks news.

To impress Lucy, Lee starts training for a 10 kilometre Fun Run only to injure himself immediately. In an effort to hide the injury from Lucy, he gets himself a secret sports massage, but this just leads to more trouble.

Jimmy once again oversees the disputes and deliberations on the topical events that set the nation's chins wagging as Jon and Sean are joined by guests Hannibal Buress, Sam Buttery, Stephen Mangan and Katherine Ryan.

Comedian Micky Flanagan and broadcaster Gabby Logan join Jamie Redknapp on the red team who are missing John Bishop this week, while heptathlete Jessica Ennis assists Andrew Flintoff and Jack Whitehall on the blue team. Sports-based comedy quiz, hosted by James Corden.

Stephen Fry hosts the quiz with a difference, joined by comedians Ross Noble and Dara O Briain, Top Gear's Jeremy Clarkson and regular panellist Alan Davies. He asks questions on the subject of idleness, and awards points for the most interesting answers.

Graham is joined on the show by Jessie J and Simon Amstell.