National Geographic Channel HDTV (NGCHD)

Chef Ramsay digs into the hidden culinary secrets of Michigan's Upper Peninsula. (Repeat).

Gordon attempts to master ancient cooking secrets in Oaxaca, Mexico's culinary capital. (Repeat).

Chef Ramsay attempts to unlock the secrets of America's bountiful Smoky Mountains. (Repeat).

Gordon discovers this island's cuisine bouncing back from devastating hurricanes. (Repeat).

Chef Ramsey finds out why Maine is the lobster capital of the world; Gordon harvests oysters, search for some seaweed and dives for clams with a team of fisherwomen. (Repeat).

In the wilds of the Lone Star State, Chef Ramsay learns the meaning of Texas Tough. (Repeat).

Considered the ultimate loners, octopuses are more sociable than ever imagined. (Repeat).

The secret of success is the extraordinary superpower of the octopus mind. (Repeat).

The octopus is like an alien on Earth but with shapeshifting superpowers. (Repeat).

The team reveals the greatest secrets in the lives of the humpback whale. (New).

In the mid-Atlantic, the team tracks down sperm whales and its prey. (New).

The team reveals the greatest secrets in the lives of the humpback whale. (Repeat).

In the mid-Atlantic, the team tracks down sperm whales and its prey. (Repeat).

In the wilds of the Lone Star State, Chef Ramsay learns the meaning of Texas Tough. (Repeat).

Chef Ramsey finds out why Maine is the lobster capital of the world; Gordon harvests oysters, search for some seaweed and dives for clams with a team of fisherwomen. (Repeat).

Gordon discovers this island's cuisine bouncing back from devastating hurricanes. (Repeat).

Chef Ramsay attempts to unlock the secrets of America's bountiful Smoky Mountains. (Repeat).

Gordon Ramsay sends his daughter Tilly and three of her friends on a mission to unlock the secrets of Costa Rican cuisine. The intrepid teens brave snakes and bullet ants while foraging in the jungle, head out into stormy seas for fresh seafood, and discover the secrets of sacred chocolate with the indigenous BriBri people. At the end of the week, Tilly takes all that she's learned and squares off

A former smuggler protests screening; batteries with crystal powder inside. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Gangster turned informer, Kenji Gallo, risks it all to bring down a New York mafia boss. (Repeat).

A young mom addicted to crack takes her child on a risky smuggling job. (Repeat).

A Boston hippie ships one of the biggest marijuana loads in US history. (Repeat).

A Londoner heads to Thailand and gets drawn into life in the fast lane. (Repeat).

A world-famous swimwear model becomes a drug smuggling empress. (Repeat).

A police informant is swept up in a brutal Hells Angels biker gang murder. (Repeat).

A Baltimore drug dealer goes undercover to take down two corrupt cops. (Repeat).

A drug cop goes after a notorious cartel boss but makes a fatal mistake. (Repeat).

CBP saves sacred African artifacts and finds a mega shipment of meth at LAX. (Repeat).

CBP finds coke on cargo ships in Miami, while HSI pursues a drug-loaded SUV in Texas. (Repeat).

HSI busts a ketamine smuggler, while CBP uncovers ancient gold looted from Afghanistan. (Repeat).

CBP discovers abandoned fentanyl in Texas while HSI tracks an ecstasy package in Chicago. (Repeat).

HSI tries to stop a delivery of meth in New York; CBP confiscates party drugs in Florida. (Repeat).

HIS busts a dark web trafficker in France. CPB discovers fentanyl in Arizona. (Repeat).

HSI busts a ketamine smuggler, while CBP uncovers ancient gold looted from Afghanistan. (Repeat).

Outlaw bikers from Australia clash with the local police and Chinese Triads about keeping control of the crystal meth trade. (Repeat).

The heroin addiction rate in Staten Island has reached an all-time high. (Repeat).

An enhanced episode: Dominican cocaine dealers have emerged as big players in the big apple (Repeat).

Drugs, guns and an angel-voiced cop, all in the home of blues and Graceland. (Repeat).

How the happy club drug Molly is becoming a menace. (Repeat).

Facts behind Montana becoming a hot spot for drugs coming in from Mexico and Canada are uncovered. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

Paid Programming. (Repeat).

(Repeat).

The team reveals the greatest secrets in the lives of the humpback whale. (Repeat).

In the mid-Atlantic, the team tracks down sperm whales and its prey. (Repeat).

The Japanese attack on Pearl Harbor changes the world. New technology reveals hidden traces of that attack, on the land and in the sea. (Repeat).

A quest to uncover the dreadful truth behind Hitler's deadly Vengeance rockets. (Repeat).

Looking into the U.S. Army's longest battle. (Repeat).

The team investigates how the Allies halted the Japanese in the jungles of Papua New Guinea. (Repeat).

Looking into how the island of Malta withstood Hitler's bombing. (Repeat).

Looking into how the Allies end up in a deadly block on the road leading to Rome. (Repeat).

The residents fill their food stocks and complete chores before the winter weather comes in. The Season 2 opener. (Repeat).

The residents of Port Protection prepare for the oncoming winter season. (Repeat).

Sam goes hunting for black-tailed deer with one of his oldest hunting partners. (Repeat).