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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.

Dylan Dreyer takes an avian adventure to discover penguins in the Antarctic, an Australian bird that dances to attract a mate and pink flamingos gathering by the thousands.

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

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

Local, national and international news.

Local, national and international news.

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.

Local, national and international news.

Host Will Ferrell; Paul McCartney performs.

Two luxury travel advisors compete for a chance to win the future business of Bachelor Nation couple Ashley Iaconetti-Haibon and Jared Haibon.

Power couples living in style include design duo Tarek and Heather Rae El Moussa in Newport Beach, Calif. And DJs Hannah Bronfman and Brendan Fallis in downtown New York.

Host Sara Gore presents a guide to upscale real estate in and around the Big Apple; in addition to a look at the homes on the market, provides interior design tips from specialists and a wealth of information on renovation and stylish living.

Local, national and international news.

WSL surfer Kirra Pinkerton; Olympic dressage rider Sabine Schut-Kery; water polo player Chase Dodd.

Ford; Chevy; hot rods; trucks; muscle cars.

Profiles of the top rookie, college and high-school talent in sports; current athletes share their experiences, advice and personal impressions of the road to stardom.

An architectural redo in Greenwich Village; the Newport Beach dream home of a real estate couple.

Weather events that defy explanation.

Tre and Cierra Boston rescue a house in Trumann, Arkansas after it was badly damaged by an EF2 Tornado; with only five days to pull it off, they transform the property into a homesteaders ranch themed home.

An adventurous young couple are pushed past their limit in a menacing Wyoming ice cave; a berry-picking excursion in Newfoundland turns into a struggle for survival.

Sharp conversational coverage of the week's news, along with in-depth profiles of the people and personalities shaping American culture, assessing the highs and lows of the week and looking ahead to the next one.

Interviews with public figures and those making news, setting the political agenda and spotlighting the impact Washington decision-making has on Americans.

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.

Dylan Dreyer investigates the islands of the Caribbean to see the mesmerizing animals that make their homes in this tropical paradise.

Golfers take the tee for the final round of the ISPS Handa Senior Open at Gleneagles. Defending champion Padraig Harrington targets a repeat victory, while Ernie Els and Stewart Cink chase the major championship trophy down the stretch.

Coverage of the 113th edition of the cycling event.

From Icahn Stadium in New York.

Stay informed with the latest breaking news and headlines.

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

The NY Yankees and the Phillies conclude their three-game series at Citizens Bank Park. The Yankees rely on left-handed pitcher Ryan Weathers, while the Phillies counter with Cristopher Sánchez. Both lineups look to establish offensive consistency.

News for the entire Orlando area.

Jimmy Fallon and celebrity guest Anthony Anderson pair up with contestants and face off over two games; hosted by Keke Palmer, players must guess secret passwords using only one-word clues for a chance to win up to $25,000.

Local, national and international news.

A syndicated news magazine includes investigative reports, interviews with newsmakers, human interest stories and celebrity and pop-culture features.

U.S. Ambassador to the United Nations Mike Waltz; Sen. Mark Kelly (D-Ariz.); author Sheinelle Jones; roundtable discussion with Lanhee Chen, Adrienne Elrod and Tyler Pager.

Hosts Mario Lopez, Kit Hoover, Scott Evans and Zuri Hall take viewers behind the velvet ropes and onto the red carpet to deliver celebrity interviews and entertainment news stories in Hollywood.

Local, national and international news.

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.

Meryl Streep and Anne Hathaway ("The Devil Wears Prada 2"); Paul Dano; the cast of "Michael"; Emma Thompson; filmmakers Olivia Newman and Shelby Van Pelt; Jacob Romero; the cast of "Imperfect Women"; Keegan-Michael Key; Amanda Seyfried; Sombr.

Celebrating people's love for their pets which is tailor-made for these pet owners; pet news, care, health and lifestyles are among the topics covered.

An invitation to look at the most exclusive vacation retreats around the world, including luxury hotels, hideaways and the best in spa escapes.

This early-morning news covers overnight events, breaking domestic and international news as well as a preview of the day's anticipated events. The program also presents regular reports from the worlds of business, entertainment and sports.

Stay informed with the latest breaking news and headlines.

Stay informed with the latest breaking news and headlines.

Stay informed with the latest breaking news and headlines.

News headlines, interviews, and stories intended to inform, entertain, inspire and set the agenda each morning for Americans and help viewers with their finances, health and well-being.

A news program intended to inform, entertain, inspire and set the agenda each morning, offering news, weather reports, and interviews with newsmakers from the worlds of politics, business, media, entertainment and sports.

America's feel-good morning show with big stars and sweet surprises; Jenna Bush Hager and Sheinelle Jones host an hour of heartfelt connection, inspirational stories, fun and laughs.

Cameoke: "Beg" and "Put It On" medley; Kurt Russell; "Scenes and Stories"; Grace Gummer; Be Seen Thank You (Colorectal Cancer); "The Arbiter" performance from the musical "Chess"; director Daniel Kwan.

Local, national and international news.

NBC News provides viewers with the latest national and international news; consumer, health and personal finance reporting; up-to-the-minute local news.

Katie and Jim, a father-and-daughter team, challenge married couple Beth and Micah.

Besties Ann and Robin go up against newlyweds DJ and Allison.

A couple say their rental property was so hot that their toilet water boiled, and one of them suffered a heatstroke; during a windstorm, a woman's trampoline jettisons from her property to her neighbor's, damaging a '67 Mustang, a truck and a house.

A man sues his ex for repayment of a loan to have breast augmentation surgery; a landlord accuses a family of intentionally vandalizing a pipe and creating a flood.

A syndicated news magazine includes investigative reports, interviews with newsmakers, human interest stories and celebrity and pop-culture features.

Local, national and international news.

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

Local, national and international news.

Local, national and international news.

A new group of ninjas from the central region hits the course as the qualifying rounds come to a close in Las Vegas; hosts Matt Iseman and Akbar Gbajabiamila, along with co-host Zuri Hall, select their fastest pick of the night.

Good Samaritan Richard went above and beyond when he drove 50 miles on his birthday to return a lost wallet to a passenger; now, the railroad conductor and his sister Erika take on the wall in hopes of winning big.

Local, national and international news.

Actor Jim Gaffigan; model Karlie Kloss; Bebe Rexha performs.

Actor Common; podcast host Brittany Broski.

San Diego Comic-Con highlights; interviews with Deidre Hall, Owen Wilson and Jon Cryer.

Local, national and international news.

Reporting of breaking news and developing stories in real time.

This early-morning news covers overnight events, breaking domestic and international news as well as a preview of the day's anticipated events. The program also presents regular reports from the worlds of business, entertainment and sports.

This early-morning news covers overnight events, breaking domestic and international news as well as a preview of the day's anticipated events. The program also presents regular reports from the worlds of business, entertainment and sports.

This early-morning news covers overnight events, breaking domestic and international news as well as a preview of the day's anticipated events. The program also presents regular reports from the worlds of business, entertainment and sports.

Stay informed with the latest breaking news and headlines.

Stay informed with the latest breaking news and headlines.

Stay informed with the latest breaking news and headlines.

Comic John Mulaney; avoiding travel regret with Misty Belles; shopping expert Chassie Post; Today Food with David Foulquier.

Supermodel Karlie Kloss; correspondent Adrianna Brach; actor Jason Biggs; Today Food with Anna Francese Gass.

The Scoop with Emily Curl; actress Emmy Rossum.

Cameoke: "Bein' Alive"; Melissa Etheridge; Camila Morrone; New York Girls Baseball; Flatland Cavalry performs; Seattle Storm head coach Sonia Raman.

Local, national and international news.

NBC News provides viewers with the latest national and international news; consumer, health and personal finance reporting; up-to-the-minute local news.

Sisters Tiffany and Brittney battle co-workers Julie and Crystal.

Mother and son Bobbie and Justin challenge mom and daughter Rachel and Gwen.

A mom stays at home to care for five children, and a heated dispute between her husband and his mother makes matters worse; after falling below the legal GPA to be in a fraternity, a young man is sued by his frat brothers over a lease and bills.

After an online acquaintance spends thousands of dollars on a woman in a matter of days, she sues him for harassment; a motorist says a mysterious white car hit his head-on and caused him to back into six vehicles.

A syndicated news magazine includes investigative reports, interviews with newsmakers, human interest stories and celebrity and pop-culture features.

Local, national and international news.

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

Local, national and international news.

Local, national and international news.

The acts that are moving on to the live shows, along with those that were selected to appear in the brand-new Judges' Callback rounds, are revealed.

Jimmy Fallon and celebrity guest Connie Britton pair up with contestants for a word showdown featuring a rock 'n' roll-themed round; hosted by Keke Palmer, players guess secret passwords using one-word clues for a chance to win up to $25,000.

Local, national and international news.

Actress Keke Palmer; actor Jacob Batalon; comic Lady Miss Jacqueline.