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In the Puget Sound, Peter and Dr. Rae witness the urgent struggle of resident orcas facing a critical threat to survival; the journey continues to a remote lagoon in Mexico's coastal desert, where gray whales have staged an extraordinary comeback.

Dylan Dreyer meets remarkable reptiles and amphibians, like enormous green sea turtles, tiny dancing frogs and a bright blue lizard.

Sheinelle Jones meets the new babies of spring, including adorable foals, bear cubs and coyote pups.

Tottenham (7-9-16) hosts Brighton (12-10-10) at Tottenham Hotspur Stadium. It is a crucial match as the season ends. Tottenham is in 18th, two points above the relegation zone, while Brighton is sitting in 9th and pushing for a top-half finish.

The best moments from the weekend in Premier League action.

From Huntington Bank Field in Cleveland.

From Long Beach Street Circuit in Long Beach, Calif.

Missing persons cases come from all over the United States.

Dylan Dreyer journeys through some of Canada's most rugged wilderness to see the life that this incredible environment holds.

A therapy dog helps its young handler find a happy place; a therapy dog helps its handler with PTSD but has challenges of its own.

Meet the man whose fields of dreams are built on hope and resilience.

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

Stay informed with the latest breaking news and headlines.

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.

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.

Live from New York for more than four decades, celebrity hosts join an award-winning ensemble cast to perform comedic sketches, satirical news and digital shorts, alongside popular musical acts; capturing the pop-culture zeitgeist, the show's sketches and segments often go viral the next day. Over the years, cast members have included Jimmy Fallon, Will Ferrell, Tina Fey, Kate McKinnon, Seth Meyer

Stay informed with the latest breaking news and headlines.

Live from New York for more than four decades, celebrity hosts join an award-winning ensemble cast to perform comedic sketches, satirical news and digital shorts, alongside popular musical acts; capturing the pop-culture zeitgeist, the show's sketches and segments often go viral the next day. Over the years, cast members have included Jimmy Fallon, Will Ferrell, Tina Fey, Kate McKinnon, Seth Meyer

A look at why Atlantic City is more than a destination -- it's an experience.

Bespoke luxury and quiet comforts.

A Frank Lloyd Wright masterpiece in Detroit; the iconic townhome featured in "Breakfast at Tiffany's.".

Stay informed with the latest breaking news and headlines.

Jeff Allen; Marianne Sierk; Kevin Avery; Joe DeVito; Joey Medina; Gary Owen; Shang.

Performances by T. Graham Brown and Brady Seals.

Paid programming.

Featuring several U.S. companies offering real jobs to America's veterans; career counselors and HR specialists share tailored insights on how to find suitable employment, as well as tips to help vets ease their transition to civilian life.

Located in the affluent neighborhood of Bel Air, the six-bedroom, 11-bath mansion is composed of three levels and an upper sun deck.

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.

Manchester City (19-7-5) hosts Arsenal (21-7-4) at Etihad Stadium. A City win shrinks the gap to three points with a game in hand, putting the title in its hands. An Arsenal win extends the lead to nine, likely securing their first title since 2004.

The best moments from the weekend in Premier League action.

The AMA Supercross Championship series invades Huntington Bank Field in Cleveland.

Home improvement expert Brian Kelsey takes to the road.

Dog training school; breed profile: Poodle.

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

Coverage of the latest storylines and news from across the NBA featuring in-depth analysis and highlights.

Eastern Conference First Round, Game 1.

Game 1 of the Western Conference First Round between the San Antonio Spurs and the Portland Trail Blazers takes place at Frost Bank Center. San Antonio won the regular-season series 2-1. Deni Avdija leads Portland with 24.2 points and 6.7 assists.

Stay informed with the latest breaking news and headlines.

Meet the man whose fields of dreams are built on hope and resilience.

A college student goes missing in broad daylight from her off-campus job at a softball field; investigators receive a mysterious phone call that changes everything.

Stay informed with the latest breaking news and headlines.

A freak accident while snowmobiling strands Suzanne and Jim Shemwell overnight as a massive snowstorm blows in; Suzanne and Jim don't realize they won't see civilization again for six days.

Featuring several U.S. companies offering real jobs to America's veterans; career counselors and HR specialists share tailored insights on how to find suitable employment, as well as tips to help vets ease their transition to civilian life.

Stay informed with the latest breaking news and headlines.

The former NFL quarterback interviews compelling figures in the sports and entertainment industries.

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

Located in the affluent neighborhood of Bel Air, the six-bedroom, 11-bath mansion is composed of three levels and an upper sun deck.

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.

Since 1982, "AgDay" has been providing farmers and ranchers news, weather and market information every weekday morning. The half-hour program covers many aspects of farming to give producers the information they need to make better decisions about their operations. The show's not just about agriculture, though, as it also features regular segments that deal with topics such as food safety, health

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.

Carol, Isabella, Brittany, and Blaine.

Players Casey, Melba, Matt and Sharon.

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

A mother's death initially appears to be a suicide, but when investigators start to interview those closest to her, an evil plot emerges.

A husband gives a frantic call to 911 after finding his wife dead in a bathtub, but the couple's daughters lead police to investigate their father.

From the deeply moving to the purely fun, the show is a daily destination for all things topical and a platform for viewers to connect with the people who are shaping the world through meaningful, engaging and entertaining conversations.

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.

Eastern Conference First Round, Game 2.

Western Conference First Round, Game 2.