An important hierarchy is established between a pair of conniving allies and a plan is hatched to oust one of the strongest and most prominent players in the game.

It's the moment you've been waiting for! This season's Top 12 are announced tonight as four more semifinalists are eliminated from the competition and sent home after America's vote is revealed. Tune in to see if your favorites earn one of the coveted spots in the Top 12

Its Family Day at Greendale Community College and the gangs families come to campus to join in the fun. Meanwhile, Jeff agrees to help Pierce connect with his stepdaughter Amber. Things take an interesting twist when Amber shows an interest in Jeff.

When a possum bites the mayor's dog on a golf course, Leslie is asked to form a task force to catch the pesky animal. Meanwhile, Ron is upset when Mark refuses to bend the rules for him

The CSIs investigate the murder of a young boy and uncover evidence linking this death to an older case that now has resurfaced.

A patient arrives at the hospital in need of a complex surgical procedure, and Richard is furious when Derek chooses Owen to do it over him. Meanwhile, Bailey nervously prepares for another date with Ben.

Michael is flummoxed when Jo takes a liking to Darryl and his shipping idea. Dwight proves an agitation when Jim returns from paternity leave. Andy and Erin have their first date planned.

Chef Ramsay visits a "high end" Bistro in Lighthouse Point, FL. British born chef, Andy Trousdale, has spent his entire adult life training and working under a variety of chefs. After living in the Caribbean for years, Andy met his wife, Elin, and was ready to try his luck stateside and open a restaurant of their own. He and his wife decided to take over a restaurant called Le Bistro, which they decided to overhaul the menu and have been unsuccessful trying to attract customers on a regular basis. Stubborn chef and owner Andy doesn't respond well to Gordon's criticisms and tempers flare.

Halfway through the competition the designers get the task to create an unconventional, innovative look and an accessory from materials from a hardware store. The limited budget makes a contender to resize his design.

Jack's dreams come crashing down when Avery informs him that a cable company is rumored to buy out NBC. Meanwhile Liz tracks down the man of her dreams whom she met in her dentist's waiting room, while Jenna reluctantly assists Tracy in pursuing a Tony Award.

When Addison's patient and the life of the three unborn babies she is carrying as a surrogate hang in the balance, Sam's new girlfriend, Vanessa, and Addison are sharply divided on the course of treatment. Meanwhile Cooper seeks Sheldon's help with a young patient, but their personal quarrels over Charlotte get in the way, and Naomi has a dilemma of her own between William and an unexpectedly charming Dr. Fife.

When Dr. Alicia Seberg, a government research scientist, is exposed to a deadly toxin while at work and has only hours to live, she calls Patrick Jane and the CBI to find her murderer.

The Important Thing discussed in this episode is the Important Thing of 2.

Archer takes a better-paying job at rival agency ODIN, and Malory is determined to get him back.

Sarah's childhood imaginary friend Troy draws her into a life of sex and drugs. Meanwhile, Steven writes a song mocking Brian after he refuses to let Steve play in his band.

Guest: Journalist Eamon Javers talks about his new book Broker, Trader, Lawyer, Spy: The Secret World of Corporate Espionage.

David Aaronovitch

Real estate mogul Donald Trump.

Dana Carvey; Kim Kardashian; musical performance by Colbie Caillat.

The panelists on this episode are Phill Jupitus, Clive Anderson and Rich Hall.

Many chairs will be needed for this guest-packed show. The cast of Outnumbered, along with Charlotte Church James Corden and Cheryl Cole, will jostle for the best seat. Also joining Jonathan is Amy Williams, who won Britan's first individual Gold for 30 years, in the Women's Bob Skeleton event in Vancouver.