Back stabbing all around in this episode of America's Next top model. Jayla steals some of Nik's lines while Coryn spits out some angry lines of her own at Lisa.

The BAU investigates the kidnapping of a U.S. District Attorney's daughter and determines the kidnapper isn't seeking money -- he's after her twin sister.

The Rock and 13-year-old piano prodigy Kit Armstrong appear on tonights show.

Join the MythBusters as they head to a California mine to test an ancient Chinese military myth – a subterranean sonar system that could allegedly detect and intercept an invasion from below. Then, armed with an incubator, agar plates and boundless enthusiasm, the guys aim to cook up the truth about a popular food fable. If food has been on the floor for less than five seconds, is it still safe to eat?

A global warming state of emergency is declared in South Park. The world’s largest beaver dam breaks and floods the adjacent town of Beaverton. As the victims wait for help to arrive, everyone in South Park tackles priority number one: who is to blame? Only Stan and Cartman know who’s really at fault.

Stephen Colbert welcomes journalist, Fareed Zakaria!