After an encounter with Dennis Duffy, Liz and Criss decide to take drastic measures to start a family. As Liz looks toward the future, Jack and Jenna evaluate their own self-worth, and Tracy laments a shocking medical diagnosis.

The University decides to reassign Sheldon's unused parking space to the newly popular Howard, a move that Sheldon feels is a slap in the face to his importance. This starts a feud between the two friends that spills over to their ladies, and Penny pays the price.

An armed and disturbed man carrying a suspicious package, is confronted by Team One on a ferry. Ed faces down his recent traumatic experiences.

Caroline does her best to be there for Stefan and Elena in a tough time. Damon tries to convince Stefan to help him uncover Prof. Shane's motives, but Stefan is intent on carrying out a different plan with Klaus. At the annual Miss Mystic Falls Pageant, Elena and Caroline give April advice on which dress to wear, while Tyler and Hayley work together on a secret project, and Damon confronts Prof. Shane with his suspicions. Alarmed by the vivid nightmares he's having, Jeremy turns to Matt for help, but the situation escalates sooner than anyone expected.

Results are in and Demi Lovato and the Young Adults: Paige Thomas and CeCe Frey, L.A. Reid and The Over 25s: Vino Alan and Tate Stevens, Simon Cowell and the Groups: "Fifth Harmony" and "Emblem3" and Britney Spears and the Teens: Carly Rose Sonenclar and Diamond White wait to see if they did enough to make it through the Double Elimination. Musical Guests: Josh Krajcik and Alicia Keys.

Marcus brings the members of the Colorado and the islanders all together to celebrate their two cultures - a feast in the spirit of Thanksgiving. But the good times turn bad the next morning when an essential crew member is accused of a serious crime. Grace handles the man's defense and is tasked with finding out the truth.

Alan's smokin' hot, famous ex-wife, Kandi, wants him back. Meanwhile, Berta isn't interested in celebrating her birthday, so Walden helps make it special.

Reagan, Chris and Scott get invited to join Gene and Terry at their mountain cabin for their annual "Family Funlympics".
Meanwhile, when Reagan decides she needs to leave the cabin to go and check up on Ava, she is shocked to learn that Ava has new friends.

Cristina and Owen continue to figure out their relationship amidst the pending lawsuit; and Bailey argues with Ben over plans for their upcoming nuptials. Meanwhile, Callie recruits Jackson to help find a solution to Derek's hand, but he is preoccupied by a shocking situation with April.

Angela discovers the harsh truth about her husband's affair with Oscar, so she reaches out to Dwight for help. Meanwhile, Jim requests a favor from Stanley and Phyllis; Pam begins painting a mural in the warehouse; and Pete creates a tower made out of complaint cards.

It's time for Sectionals, and New Directions receives guidance from some of the recent McKinley graduates who volunteer to mentor the glee club during their Thanksgiving breaks. Meanwhile, Rachel and Kurt have a non-traditional holiday dinner in the Big Apple.

An unhappy couple hire hitmen to dispose of each other, and both of their Numbers come up. Meanwhile, love is in the air for Fusco and Carter, while Finch reminisces about his past with Grace.

The designers create edgy, androgynous apparel in a challenge that comes with a twist. Guest judges: Jason Wu and Robert Rodriguez.

JT thinks Vincent may somehow be involved in Cat's homicide investigation after she mentions a local college fraternity brother was brutally killed. JT examines Vincent to determine the cause of his increasingly frequent blackouts, but when Vincent starts to beast out, JT is forced to tranquilize him. Meanwhile, Evan and his new intern find a strange cut on the victim's ankle, which matches that of a female cadaver left on campus a year earlier. As Evan works to uncover more clues from the crime scene, he is kidnapped. Cat begs Vincent to help find Evan and save his life, yet she doesn't realize that she's putting Vincent's life in serious danger.

Leslie makes a public appeal for park design suggestions, but becomes suspicious when the best design comes from an architect in Eagleton. Tom enlists the help of the office as he sets up his new "Rent a-Swag" business, while Andy finds a way to make his new security guard job exciting.

With Charlie under his wing, Frank cleans up so he can get his hands dirty and help out his old company with one last big merger. An unwritten rule of the bar gets the rest of the gang caught up in a case of mistaken identity.

Michael arranges to be captured by a Syrian intelligence officer in order to rescue an inept smuggler. Riley offers Madeline a deal in hopes of tracking down Michael.

The Meatballs reconnect; the house discusses Jionni's failings as a father; Vinny nearly has a threesome; Vinny is nervous about Jionni's reaction.

Harrison leads the team in managing a billionaire businessman who seems to have lost his sanity; meanwhile, Olivia and the White House prepare to celebrate the President's 50th birthday, as James continues to investigate Cytron and discovers something that could change the fate of the country.

While investigating an explosion that kills two people, Sherlock discovers a crime that's been lying dormant for years. Meanwhile, Watson encourages Sherlock to finally pick a sponsor.

Pete fights over a pair of shoes with a man in a wheelchair (JB Smoove). Taco teaches a dog to recognize the scent of sex. Jenny and Kevin get Ellie a piano.

Calvin Trillin

Jason Sudeikis, Dick Van Dyke, Nas

Sean Carroll

Newt Gingrich, Ron Shirley, Grouplove

Kristin Davis, Nat Faxon

Karl is joined by Warwick Davis as they attempt to follow in the footsteps of Marco Polo. They begin their adventure in Venice.

Jack Whitehall hosts whilst Nick Hewer and Baroness Trumpington are the guest panelists.

A League Of Their Own is going for an Olympic guest record, with Laura Trott and Micky Flanagan, Zara Phillips and funnyman Micky Flanagan.

Stephen is joined on the show by Julian Clary, Ross Noble, Bill Bailey and Alan Davies as they look at jumpers.

Graham is joined on the show by Jake Gyllenhaal, Joan Rivers, Jeremy Clarkson, James May and Kesha.