Nat Geo HD Schedule, Yesterday (United Kingdom)

Join the anti-narcotics squad at Colombia's El Dorado International Airport as they crack down on smugglers. A man confesses his heart-wrenching reason for breaking the law. Rating: 12+

Maine Paper Factory: The team search a sprawling disused paper factory. But with plans to turn it into a museum, will its owners be willing to sell its many treasures? (S1, ep 4). All Ages.

Coffee & Clam Chowder: Learn how Dunkin' Donuts makes 1.8 billion cups of coffee a year, get the scoop on New England chowder and visit the home of Slap Stix lollipops. U. (S2, ep 11)

Slaw & Soup: Visit the factory churning out a million mini cheeses every day, meet the famous face behind Soupman and try a revolutionary new condiment. U. (S2, ep 12)

Sneakers: New Balance reveal how high-tech machinery, hand-crafting skills and global logistics combine to make their best-selling sneaker across the world. (S1, ep 3) All ages.

SUVs: Jeep is the original all-terrain car maker. Here, unprecedented access to the brand's Ohio factory lifts the lid on how the iconic 4x4 Jeep Wrangler is made. (S1, ep 10)

Deadly Gamblers: Food, safety, shelter - these animals have it all. But for some strange reason they're about to give up the good life and march headlong into hardship. Why? (S1, ep 10)

Furious George: Monkey the anxious bush baby has been harming his tail. Will Dr K have to amputate? Suitable for all audiences. (S1, ep 1)

Teleshopping.

Slaw & Soup: Visit the factory churning out a million mini cheeses every day, meet the famous face behind Soupman and try a revolutionary new condiment. U. (S2, ep 12)

Tomatoes & Cheese Sticks: How do you get tomatoes to ripen twice as fast as usual? Or transform 100,000 pounds of cheese into mozzarella sticks every day? Find out here. U. (S2, ep 13)

3rd Time Unlucky: After clearing the Manx2 Flight 7100 for landing, controllers at Ireland's Cork Airport are shocked when it crashes into the runway. U. (S13, ep 9)

Toxic Wrecks: The team discover two ships laden with deadly cargos - ticking time bombs set to explode, but no one knows when. All ages. (S1, ep 9)

Secrets of the Nile: Archaeologists investigate how the mighty River Nile transformed ancient Egypt into one of the greatest civilisations of the ancient world. U.

The Herald Angels: Tim and Fuzz head to Cornwall in an attempt to save a run-down Triumph Herald which has been left sitting in a garage for five years. (S2, ep 4) RATING: AA

Lockdown Lockup: CBP finds a smuggler of so-called 'crazy pills' at JFK, and responds to the Covid-19 crisis on the southern border. RATING: NU12 (S3, ep 1)

Deadly Display: Experts investigate how a brand new super jet with an expert crew managed to crash into a mountain during a demonstration flight. U. (S17, ep 5)

Drain the Last Wrecks of World War II: The wreckage from one of Hitler's U-boats continues to leave a poisonous Nazi legacy behind. RATING: AA

Audie Murphy's Finest Hour: As the Allies try to clear the Colmar Pocket, American second Lieutenant Audie Murphy sends his company back during an enemy counterattack. U.

In the final episode of the series, Tim and Fuzz travel to Eastbourne to help car lover and Alzheimer's suffer Andy restore his 1954 Citroen Traction Avant. (S3, ep 10) RATING: AA

Hunt for the Pyramid Tomb: Experts go 100m under the sand as they uncover why the pharaohs swapped the Giza pyramids for a secret cemetery in the Valley of the Kings. All ages. (S1, ep 5)

Disaster at Dutch Harbor: Investigators struggle to explain why PenAir 3296 failed to stop after landing at a famously tricky Alaskan airport - until they uncover the truth. U. (7 of 10)

Investigation into the mysterious disappearance of Nazi submarine U-745 which vanished in 1945. The frozen body of its captain was found on Foglo island. But what had happened? U.

Battle of Britain: Soar through the Battle of Britain from a unique aerial perspective, as over 1500 British and German planes engage in a duel to the death above England. U.

Hitler's War in the Skies: As Hitler calls for Total War, every man, woman and child is forced to play their part. The result is one of the greatest air defence systems ever. All ages.

Explosive Evidence: When Air India Flight 182 disappeared from the radar, controllers were left baffled. Investigators later discovered a sinister reason for the deadly crash. All Ages.