National Geographic Channel HDTV (NGCHD)

Ultra-athlete Ross Edgley pits himself against four legendary sharks. (Repeat).

Anthony Mackie uncovers a shark mystery with fishermen in Louisiana. (Repeat).

Chris Hemsworth investigates how people can live harmoniously with sharks. (Repeat).

A teen survives facing one of the ocean's deadliest predators. (Repeat).

Every year tiger sharks gather in big numbers in Maui. What's the cause? It's a mystery that's a decade in the making. Now, a team of fearless shark scientists gets hands-on with one of the ocean's largest predators to find out. That means free diving, face-to-face and unprotected. But these young women will do whatever it takes to get the data they need to crack the case. (Repeat).

Drones reveal that some sharks live closer to the shore than imagined. (Repeat).

Are female sharks the ultimate rulers of the oceans? (Repeat).

An inspiring journey that reveals hammerheads connection to lunar cycles. (Repeat).

Even the biggest and fiercest predators start out...as baby sharks. (Repeat).

With bonus content, experts study baby great white sharks near NYC. (New).

A look at shocking strings of shark attacks. (Repeat).

Even the biggest and fiercest predators start out...as baby sharks. (Repeat).

With bonus content, experts study baby great white sharks near NYC. (Repeat).

A look at shocking strings of shark attacks. (Repeat).

In this enhanced episode, shark attacks along the Gulf coast incite panic. (Repeat).

In this enhanced episode, shark attacks terrify beachgoers and experts. (Repeat).

Miami and Galveston Island are rocked by a mysterious rise in shark attacks. (Repeat).

Sharks invade the Carolina waters. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Three shark attacks turn the island paradise of the Bahamas into a deep-sea nightmare. (Repeat).

An investigation into why the Western Cape has been rocked by 27 shark attacks in two decades. (Repeat).

Scientists investigate four shark attacks that occurred within 10 minutes of each other in Myrtle Beach, South Carolina. (Repeat).

A look back at December 2010, when sharks attacked the resort of Sharm El Sheikh, Egypt. (Repeat).

Four shark attacks in less than two months rock the tranquil shores of North Carolina. (Repeat).

Nine shark attacks in three years rock the Big Island of Hawaii. (Repeat).

A study of animals that would do battle with sharks. (Repeat).

In the oceans of Ascension Island, yellowfin tuna and mako and tiger sharks are all apex predators, but to these sharks, yellowfin tuna are the ultimate prize. (Repeat).

With shark attacks on the rise worldwide, the crew revisits some harrowing stories from the world's deadliest shark-infested surf beaches. (Repeat).

Orcas attack white sharks for their livers leaving scientists baffled. (Repeat).

The inventor of a wetsuit designed to protect the wearer from shark bites puts his creation to the test by encouraging a deadly tiger shark to attack him. (Repeat).

A clash between bull sharks and a hammerhead launches an investigation. (Repeat).

Experts investigate a series of shark attacks in Australia. (New).

Experts are investigating a sequence of bull shark bites. (New).

A popular Mexican tourist destination is losing revenue due to shark attacks on its beaches. (Repeat).

Experts investigate a series of shark attacks in Australia. (Repeat).

Experts are investigating a sequence of bull shark bites. (Repeat).

Nine shark attacks in three years rock the Big Island of Hawaii. (Repeat).

Four shark attacks in less than two months rock the tranquil shores of North Carolina. (Repeat).

A look back at December 2010, when sharks attacked the resort of Sharm El Sheikh, Egypt. (Repeat).

Scientists investigate four shark attacks that occurred within 10 minutes of each other in Myrtle Beach, South Carolina. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

The shark attack capital of the world is in Florida. (Repeat).

Investigators seek the cause behind a strange surge of shark attacks in Texas. (Repeat).

Two fatal shark attacks in just two weeks rock the honeymoon haven of the Seychelles (Repeat).

Southern California is the site of twelve shark attacks in just two years, and experts race to solve the cause behind it. (Repeat).

Twelve bloody days on the Jersey Shore increase the nation's fear of sharks. (Repeat).

When two shark attack on the same day at the same place, experts search for answers. (Repeat).

Dr. Michael Heithaus sets out to reveal the connection between sharks and volcanoes. (Repeat).

An exploration of the lethal waters surrounding Alcatraz and the myth of Sharkatraz. (Repeat).

Marine biologists investigate why sharks attack boats. (Repeat).

Big and dangerous predators are invading unexpected waters, from golf courses and swimming pools to lakes and backyard keys. Through analyzing user-generated footage, shark experts get to the bottom of how and why sharks seem more willing than ever to meet us on our own turf. In a bizarre twist, people encountering sharks in unexpected places are called to urgent action. (Repeat).

Shark encounters off the coast of California are skyrocketing. Now, a team of researchers is on a mission to investigate a newly discovered white shark hot spot close to popular beaches and determine how many great whites are out there. Their expedition will bring them face-to-face with some of the biggest sharks on the planet. (Repeat).