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The latest world and national news.

Wil Wheaton invites Leonard and Sheldon to a party at his house; Howard receives an opportunity.

News of the tornado reaches Sheldon and Mary in Germany; with the Cooper house in chaos, Missy steps up.

Marty meets Courtney's intimidating father to ask for his blessing, but Clancy's cryptic response sends Calvin and Tina digging for answers; Gemma and Dave are stunned by Grover's tattoo.

Colette and Gregg convince Vic to foster a dog and help him clean up his act to meet the dog rescuer Howie's high standards; Ceci tries to repay Barb by boosting Noa's processing time, mainly by toning down his hotness.

A double homicide in Brooklyn sets the team after a corrupt longshoreman, but they soon discover something sinister has been smuggled into New York; Isobel enlists the help of CIA's Deputy Chief of Station Nikki Reynard.

After Colin receives a tip on an upcoming terror plot, the team recovers a young man who was kidnapped nine years ago in Turkey and dig into his time in captivity to help stop the attack; Bill looks into someone very close to Colin.

Stay informed with the latest breaking news and headlines.

Improv actor and comic Stephen Colbert flexes the hosting muscles he honed over nearly 1,500 episodes of the popular and critically celebrated "The Colbert Report" at the helm of this long-running late-night talk show. Following the genre's classic formula, each show kicks off with a monologue and a look at recent headlines, and features sketch comedy, celebrity interviews and musical performances

Host and comedian Byron Allen invites four A-List comedians to this round-table comedy talk show. Guest comedians share their own funny perspectives on current events, everyday life, pop culture, entertainment and more. Filmed in front of a live audience in Hollywood, previous guests have included: Dennis Miller, Tom Arnold, Howie Mandel, Jon Lovitz and Cedric the Entertainer.