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Yellowstone National Park is shut down when flooding carves out a path of destruction; a major heatwave ignites deadly wildfires across Spain.

During Hurricane Harvey, realtor Crystal McDowell vanished en route to her ex-husband's home. Despite the storm's chaos, investigators pursued leads through floods and tragedy. Her car was found in a Motel 6 lot, likely abandoned by the killer. Days later, ex-husband Steve McDowell confessed to murdering her as Texas reeled from the disaster.

Irrational, uncontrollable fears of weather.

Salvors tackle a mystery wreck removal of a vehicle sitting in mud at the bottom of a river; the police and fire department remain on call as they suspect a body remains inside.

Paid programming.

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A kayaker struggles against unforgiving ocean currents; a family of fishermen are stranded at sea.

This magazine-style program, which premiered in 1975, focuses on news in the agriculture and agribusiness industries.

A look at wild bird habitat. Showcasing the people that help create habitats.

Adrenaline-pumping action, breathtaking scenery, and unforgettable encounter off-road.

Ron Schara shares his stories of outdoor sports.

Take a look into the factory and see how various brands of outdoor gear are made.

Paid programming.

Plexaderm helps reduce Under Eye Bags, Dark Circles, and Wrinkles in just 10 minutes!

Paid programming.

Paid programming.

Jann and Rodney explore a unique California town where horses have the right of way-trails replace sidewalks.

Helping a disabled dog named Doe; breed profile:Labrador retriever.

A rider is trapped under her horse; helping a deer that is stuck in a canal; a dog falls into an icy pond; saluting animal rescue heroes; spaying and neutering.

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.

Learning about the material strength of structures.

Jeff travels to the beaches of southern Florida to uncover the challenges facing sea turtles locally and around the world; releasing baby turtles into the ocean; caring for sick and injured turtles.

A suffers from a broken tooth and matted fur; the adoption staff welcomes a border collie that needs to be re-homed.

Intelligence's investigation of a nightclub owner suspected of cocaine distribution is complicated when Ruzek recognizes someone close to him while working undercover.

When the wife of an alderman is beaten to death, Voight finds himself under pressure from Brennan to close the case; Upton shares a dark episode from her past to elicit a confession.

Voight urges Halstead to remain impartial and follow the facts when the leader of a local mosque becomes the suspect in the bombing of an Army recruitment center.

The stakes become personal for Atwater during Intelligence's investigation of a drug dealer suspected of homicide.

As his dependency on prescription painkillers grows, Antonio crosses a line, endangering someone close to him and ultimately putting the entire team at risk.

When you're young and single in the city, your friends are your family. A tight-knit group of friends living in Manhattan -- three girls and three guys -- navigate the complexities of adulthood and rely on the companionship, comfort and support they get from each other to deal with the pressures of life.

Mandy's volatile pre-wedding day behavior causes Ed to opt out of the festivities, leaving Mandy to find a new best man for Kyle.

Stay informed with the latest breaking news and headlines.

"In Depth" is in Seattle with Seahawks head coach Mike Macdonald, fresh off a Super Bowl win; he reflects on his journey from an intern to a champion; Graham gets a tour of Macdonald's 10-acre property and chats with Seahawks quarterback Sam Darnold.

Graham sits down with Heisman Trophy winner Tim Tebow at his home in Jacksonville, Fla. The former star quarterback reflects on his career and the lessons he's carried with him; Tebow also shares the inspiration behind the Tim Tebow Foundation.

The guys have a chance to buy a classic 1973 pinball machine, but it needs extensive repairs; Corey and Chum meet a man interested in selling his Segway; a woman hopes to sell a 1924 St. Gaudens Double Eagle gold coin.

A pocket-sized sundial believed to date to the 16th century conceals a secret; photo album of union leader Jimmy Hoffa; 1960s rifle sharpshooting game.