The Top 20 find out whether they did enough to make it into the 10 spots onto the LIVE shows and Tour. They perform a victory song after they have found out that they are through to the next round.

Leonard, Sheldon and Wolowitz speak to junior high girls about careers in science. Meanwhile, Koothrappali plans a date with Lucy.

The study group heads to Shirley's for a Bennett-filled thanksgiving, which is so awkward that they immediately begin plotting their escape. Meanwhile, Jeff heads to his estranged father William's house, whom he hasn't seen since he was a child.

Alan finally gets on Walden's last nerve and after a fight, Alan moves out and stays with Herb.

The Machine sends Finch and Reese six Numbers and they soon discover that they belong to six missing persons... and the sixth one disappeared on an island in the middle of a heavy storm. Meanwhile, Carter questions Cal's trustworthiness after Moss warns her about the detective.

The contestants design fashion-forward prom looks constructed from duct tape. Guest judge: designer Chris Benz.

The guys hold an auction to help a friend sell a collection; and a customer expresses a kinship with a Spider-Man nemesis.

Tensions rise as a high stakes bet leads to a turf war. Poachers steal gators from several of the hunters. In the aftermath of hurricane Isaac one of the veteran hunters suffers a devastating loss.

As everyone recovers from Will and Emma's wedding, the glee club is given the assignment to sing their favorite song from a movie. Meanwhile in New York, Santana makes herself at home in the loft a little too quickly for Rachel and Kurt's comfort. Also, the members of New Directions sing the hit series' landmark 500th musical performance in the all-new "Girls (And Boys) On Film".

Charlie and Kate face off as expert witnesses in the same trial.

When Skip decides to start an official podcast of the Gilchrist White House, much to Marshall's dismay, he makes a surprising personal discovery that may have an impact on his relationship with his father. Meanwhile, Becca interferes with Emily's parenting decision regarding Marigold's academic future, which leaves them at odds with one another.

While attempting to navigate the Maze of Terror, one nerd's stay at Nerdvana comes to a dead end. Then the tension and trivia-filled Nerd Bowl whittles the competition down to the final two contestants, who must face one final twist to determine who will be crowned "King of the Nerds".

Archer heads to the Mexican border to capture a notorious coyote, which is Spanish for coyote.

Nathan helps a department-store Santa who's harboring a dark secret; and develops a marketing plan for a petting zoo. Also: A teen is nabbed doing graffiti.

While running an errand with Steve and Billy, Jim discovers Janice has become a hoarder, forcing her husband Walter to live outside. In a misguided intervention, Jim uncovers more family secrets.

Tom Coughlin

James Franco, Robert Kirkman

John Sexton

Zach Braff, Gillian Jacobs

Jimmy Carr returns with the irreverent panel show, in which team captains Sean Lock and Jon Richardson are joined by Henning Wehn, Vernon Kay, Denise Van Outen and Nick Helm.

Duncan Bannatyne joins Adam Hills, Josh Widdicombe and Alex Brooker as they provide their take on the topical moments of the past week.