Nat Geo HD Schedule, Today (United Kingdom)

Head of the Snake: It's 1992. New York City is plagued by a heroin epidemic. And the FBI are struggling to pin down the kingpin, unassuming Canadian Tse Chi Lop. 16+.

Join the anti-narcotics squad at Colombia's El Dorado International Airport. With smugglers constantly inventing new tricks and way of eluding them, there's never a dull moment. Rating: 12+

Handheld Shotgun: Weapons expert Sean finds a chest that could have hoarded pirate treasure on the high seas. Plus, Shooter stumbles upon a unique anti-bandit gun. All ages.

Lemons & Space Food: Visit Sunkist's headquarters in California, learn how to make freeze-dried astronaut food and take a bite out of a mouthwatering Texan pecan pie. U. (S2, ep 3)

Bacon Flavored Soda & Chocolate: Explore a smokehouse, take a sip of bacon-flavoured soda or a bite out of chocolate-covered bacon on this hunt for the best bacon experience. U. (S2, ep 4)

Electric Guitars: Gibson Guitars in Nashville, Tennessee, spill the beans on how they make their iconic instruments. (S1, ep 2) RATING: AA

Helicopters: In this episode, see how Airbus make the H-125 - the most popular single engine chopper on the planet. (S1, ep 4) RATING: AA

Monarchs Amazing Journey: A look at the monarch butterfly's incredible multi-generation migration from Mexico to Canada - a round trip that none of them live to complete. (2 of 10)

The Gauntlet: It's baby boom time on Africa's vast Serengeti Plain. One million wildebeest halt their migration to give birth. And there are predators everywhere. (S1, ep 3)

Teleshopping.

Bacon Flavored Soda & Chocolate: Explore a smokehouse, take a sip of bacon-flavoured soda or a bite out of chocolate-covered bacon on this hunt for the best bacon experience. U. (S2, ep 4)

Cookies & Crab Cake: Enjoy Seattle crab cakes and Cold Stone ice cream. Plus, save yourself a flight back to Europe and discover flaky French pastries in the US. U. (S2, ep 5)

Death at Narita: Investigators examine similarities between a crash landing at Tokyo's Narita Airport and an accident at Newark Airport more than a decade earlier. U. (S13, ep 5)

Secrets of the Tasmanian Tiger: A unique dig site in Australia helps solve the mystery of the Tasmanian tiger and its extinction. U. (S1, ep 6)

Rise of the Mummies: Archaeologists hunt for clues to the mysterious rise of mummification and investigate what could be one of the oldest mummies ever found. All ages. (S3, ep 3)

Tim's Ultimate Experiments: Discover some of Tim's most epic experiments.

Party Drugs: CBP looks out for party drugs, prostitutes and counterfeit goods entering Miami during Super Bowl weekend. RATING: NU12 (S2, ep 7)

Nuts and Bolts: Investigators call on a friend and colleague of the crew as they investigate the fatal crash of American cargo plane, Emery Worldwide Flight 17. U. (S17, ep 1)

Villains of the Underworld: What wiped out the pirate city of Port Royal? And what made Alcatraz so inescapable? We drain the ocean to reveal the secrets of the sea's floor. RATING: AA

Fortress Fury: In 1944, it falls to a small group of American soldiers armed with plastic explosives, grenades and gasoline to capture the all-important Fort Koenigsmacker. U.

Plans to restore a loved 1963 Alfa Romeo Guilia Spider grind to a halt when its owner is hit by a crippling medical condition. Can the boys work their motoring magic? (S3, ep 6) RATING: AA

Tomb Raiders: Experts make a gripping discovery as they investigate one of the last tombs still to be excavated. Plus, a rare find casts new light on mummification. All ages. (S1, ep 3)

The Emiliano Sala Tragedy: A plane carrying footballer Emiliano Sala vanishes over the English Channel, but questions are raised when investigators find the wreckage. U. (3 of 10)

Curse Unleashed: Paleoanthropologist Ella Al-Shamahi begins to unravel the extraordinary truth behind the legend of Tutankhamun, investigating the 'pharaoh's curse'. U. (1 of 2)

Truth Behind the Curse: Ella Al-Shamahi dives deeper into the truth behind Tutankhamun's curse - can modern science can explain a number of the deaths attributed to it? U. (2 of 2)

TVR Grantura: Tim and Fuzz head to Norfolk to take on a 1962 TVR Grantura that has been off the road for nearly 50 years. U. (7 of 10)

Behind Closed Doors: A design fault leads to an explosion on a DC-10. Two years later and the same fault causes a similar tragedy. It could've been prevented so why wasn't it? All Ages.