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Actress Anne Hathaway; actor Alan Ritchson.

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A man accuses his ex-girlfriend of throwing out his belongings; a musician accuses a director of stealing ideas for a music video and using them in another client's project.

Jon Lovitz; Sheryl Underwood; Adam Carolla; Byron Allen; Whitney Cummings; Jamie Kennedy.

Meemaw takes matters into her own hands when Sheldon's philosophy teacher sends him into a tailspin; George Sr. learns Georgie has been cutting class.

The guys fight over what message Raj should write for NASA in case of alien contact; Penny has to decide between auditioning for a movie or keeping her pharmaceutical sales job.

When George Sr. asks Sheldon to keep a secret from Mary, the stress of not being honest drives Sheldon to hide out at Tam's for his first sleepover.

Guest host Paige DeSorbo meets the next generation of trailblazing New Yorkers.

Discovering Alaska's untouched beauty, from bear watching to climbing pristine glaciers.

Meet the next generation of superstar female athletes around the country as we go behind the scenes to shine the light on them and their interests off the field, along with catching up with the female legends who paved the way for all this growth.

Travelers and locals around the world change how people think about farm living.

Home improvement expert Brian Kelsey takes to the road.

A miniature horse works as a service animal for a diabetic dog trainer; a dog gives his handler new hope.

Dr. Rae joins researchers using advanced tools in Mexico to study gray whales, wolverines and toads; meanwhile, Peter dives into the Great Barrier Reef where scientists are cultivating heat-resistant coral to help protect their fragile ecosystems.

Coverage of the 113th edition of the cycling event.

Danielle and Dr. Pablo dive into the science of sleep with the help of drummer Gina Schock; through lab testing and immersive storytelling, the trio breaks down the main forces that control sleep and what happens when they stop working in harmony.

From Gleneagles Golf Club in Perthshire, Scotland.

From Icahn Stadium in New York.

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Tom Llamas anchors the latest news, going beyond the headlines to see how lives are affected by the world around them.

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Music, cars and celebrities come together in a cross-country concert special through the heart of America.

A new group of ninjas enters the competition as the central regional qualifying rounds begin in Las Vegas with an updated obstacle course; hosts Matt Iseman and Akbar Gbajabiamila, along with co-host Zuri Hall, select their fastest pick of the night.

Anchored by Lester Holt, "Dateline" is NBC's signature newsmagazine, bringing viewers storytelling at its best by putting the pieces together to present the full picture of real-life events. NBC News correspondents cover compelling stories and issues of the day, ranging from mystery and crime to in-depth investigations and breaking-news events.

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Host Will Ferrell; Paul McCartney performs.