Leonard escorts Amy to a wedding. Meanwhile, Howard and Bernadette spend the weekend with his mother.

Klaus and Stefan arrive in Chicago, where Stefan is reunited with a vampire who hasn't really moved on from her interest in him decades earlier. In a flashback to Chicago in the 1920s, Stefan comes face-to-face with a shocking chapter from his wild past. After Damon gets a tip on Stefan and Klaus' whereabouts from an unexpected source, he and Elena follow their trail. Back in Mystic Falls, Tyler is concerned about Caroline and turns to Sheriff Forbes for help.

Senor Chang settles in with his new job as a Greendale Campus Security Officer, while Britta is dealing with issues of civil disobedience after her friend is taken hostage in a foreign country. Annie is taking part in the Model United Nations competition and asks for help from the group to defeat her "friend" Annie Kim.

When a young modeldisappears, the Angles try to crack the case by going undercover in the fashion world, and Kate's ex-fiance, Detective Ray Goodson, is also involved with the case.

The auditions conclude in Newark, New Jersey as the talent and Simon, Cheryl, Nicole, L.A., and Paula are ready to see if they can have a winner among the groups.

Ben gets roped into helping Tom with his new buisness while Leslie tries to save Ron from the controlling powers of his first wife, Tammy.

When etiquette columnist Andrew Carlson is told he must adapt to the new, sexier style of his magazine, he hires his old high school bully Bert Lansing to help him become a modern man.

The Chief makes a career-changing decision that shocks Seattle Grace Hospital; Cristina and Owen try to find normalcy in their relationship; April continues to struggle in her new role; and the 5th year residents are given their first solo surgeries, only to find out that even the most routine procedures aren't always easy.

The staffers are motivated to sell when Robert delivers an exhilarating speech challenging them to double their sales and offers them an off-the-charts reward. Meanwhile, Pam bonds with an unlikely person over her pregnancy.

Cassie receives an invitation to the school dance from a cute athlete named Luke, and she decides to accept his offer after seeing Adam and Diana spend time together at the boathouse. Melissa sees the dance as an chance to form a closer relationship with Nick.

The Machine gives the Social Security number of a girl that has been dead for two years. Reese and Finch try to track down an apparent ghost while Finch remembers his partner's objections when he first created the Machine.

The seven remaining designers have to create looks inspired by the fashion of the seventies.

When Whitney realizes that she and Alex have never gone on an official first date, she comes up with an unusual idea to recreate the past. Taking this very seriously she insists that they follow all of the "rules" of a first date, thus the two awkwardly go to dinner and cap off the night by sleeping in separate apartments.

Frank inadvertently invests in a children's beauty pageant with a man who turned out to be a diddler. Unable to back out, he moves the show on while trying not to make himself look suspicious. The guys, meanwhile, back the lone boy, as former children's pageant winner Dee joins in via the front-runner's sister.

While Violet is nowhere to be found, the rest of the doctors work together to save Pete's life after he suffers a heart attack. Addision wants a baby so she decides to meet with aspecialist, only she runs into Jack Reilly, the mystery man she kissed. Sheldon is determined to help with Amelia's alcohol problem.

The CBI has a new supervising agent, Ray Haffner, while Patrick Jane is trying to get his team back together.

Snooki is devastated over her big fight with Jionni, and decides to take a break from the relationship. Mike thinks it's finally his chance to win her over, but it's someone else who ends up comforting her. Meanwhile, Deena has a pregnancy scare.

Jane is called into Duffy's homicide and kidnapping case after Sweeney calls for all hands on deck. Duffy gets irritated with Jane after she suggests talking with the deceased woman's employees. Meanwhile, Jane meets Matt's son for the first time.

Archer and his fellow prisoners attempt to escape from the Pirate Fortress. Meanwhile, Malory plays hardball in ransom negotiations. Conclusion of a three-part episode.

Tony Bennett

Ruth England & Mykel Hawke, Portugal. The Man

Mark Cuban

Kaley Cuoco, Skipper Bivins & Trent Jackson, Death Cab for Cutie

Albert Brooks, Chaz Bono, TV on the Radio

Trent tracks the source of strange occurrences, including a hostage situation with SUVs and Sam's partnership with a creepy new team member.

Carson Kressley, Michelle Monaghan

Eight of the celebrity couples take to the dance floor for the first time. After each of the couples have performed the judges give their verdicts on what thy have seen and give their scores.

Annie learns from Banks about a murder that has taken place on the Moors and he asks her to lead the investigation. The victim was discovered in her wheelchair, with her throat cut and disfigured face. The body was found in the same place that Marcus and Lucy Payne, a previously gruesome case for Banks, had buried one of their victims. Banks travels to the Market Square to investigate the murder of a teenage girl, whose body has been discovered in a storage room down an alleyway. Timothy Randall, who found the body, comes under immediate suspicion of being her killer. After Annie pays a visit to a local care home to try and identify the victim, she is shocked to find out the dead girl is Lucy Payne. Dr Waring and Banks start to unravel the psychology of the case and makes some progress after he is able to identify the DNA of Randall on the victim's clothing. he up makes an arrest, but while his suspect is in custody, a second alleyway murder happens.

Karl takes a trip on the Trans-Siberian Express. He is expecting luxury, but Ricky and Steve have other ideas for the trip.

Jimmy Carr presides over team captains Sean Lock and Jon Richardson with guests Sarah Millican, Joe Wilkinson, Nick Grimshaw and Ollie Locke from Made in Chelsea, as they thrash out the hot stories of the week, from the silly to the serious.

Stephen Fry comes over all indecisive. With Phill Jupitus, Rich Hall, Jimmy Carr and Alan Davies.

Robin and Artemis are forced to save their super-powered teammates when two attackers launch an assault on Mount Justice.