Nat Geo HD Schedule, Today (United Kingdom)

Cocaine Leaks and Ancient Greeks: A drug vehicle unloads in a parking lot and the driver flees on foot. Meanwhile, a second stash of cocaine is found in a storage unit. 7+. (S7, ep 3)

The Drug Mule Scam: When Mariana learns that 66-year-old American Rodney Baldus is locked up in a Mozambique jail for drug running, she begins a unique investigation. 16+. (6 of 10)

Maryland Silk Mill: The team turn up one-of-a-kind items in an old silk mill that's been abandoned since 1957. But can they convince their owner to sell at the right price? (S1, ep 3)

Maryland Grist Mill: Jay makes major finds under a pile of rubble in an 18th-century mill, including a set of beautiful antique tiles that could be worth $140 each. (S1, ep 3). All Ages.

Whiskey & Coke: Step inside Jack Daniels' Tennessee headquarters, before heading to Georgia to celebrate the 100th birthday of Coca-Cola's iconic contour bottle. U. (S2, ep 10)

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)

Pirate's Deadly Pistol: An 18th-century flintlock is up for auction. The four-barrel gun was extremely expensive to produce, making it coveted booty for pirates. All ages.

The Secret Flame: A World War II searchlight seeks out the team in Colorado, where Sean also finds a simple Italian flintlock that hides a deep and valuable secret. All ages.

Something to Swhine About: Dr Kelleher returns to treat an array of patients in the hopes of reuniting them with their loving owners. RATING: AA (S2, ep 4)

Teleshopping.

Fries with a Twist: Get an insider's look at the making of curly fries, red velvet cakes, vegetable potpies, and so many more of your favourites! (S3, ep 15) RATING: AA

Plenty of Fish: Get an insider's look at the making of fish fingers, sweet potato fries, cookie dough batter, and so much more! Suitable for all audiences. (S3, ep 16)

Terror In San Francisco: Experts are forced to confront a controversial issue as they dig into the fate of Asiana Airlines Flight 214 which crashed into a seawall in 2013. RATING: AA

Fortress Berlin: A look at the extraordinary defences and kill zones that surrounded Hitler's bunker in Berlin, a subterranean safehouse protected by 13-foot-thick walls. All ages.

How to Start a War: It turns out you can start a war over almost anything, from an unprovoked invasion to a lost ear, a pastry or a stolen bucket. (S1, ep 4)

Ultimate Faves: In this special episode, Tim and Fuzz look back at some of their favourite moments across 12 years of restoring old bangers. 7+. (1 of 4)

Powdered Rims: As HSI seizes cocaine-filled tyre rims in Puerto Rico and lots of meth and fentanyl in San Diego, CBP Miami finds $400,000 of cash bound for Cuba. All ages. (S3, ep 15)

Terror over Egypt: Terrorists claimed responsibility when Metrojet 9268 broke up in the air after leaving Sharm el Sheikh. But can experts prove what really happened? (S16, ep 5) RATING: AA

The Wild West: Political turmoil in Norway leads The Vikings to journey west. On their travels, they become the first Europeans to reach North America. U (S1, ep 5)

The Great Barrier Reef: Investigate the mysterious sinking of Australia's 'Titanic', and join a ROV expedition on a search for clues at the bottom of the reef. All ages. (S4, ep 4)

Tim and Fuzz's Greatest Hits: Tim and Fuzz take a road trip around Britain in Tim's 1965 Mustang Fastback as they revisit their favourite cars of past series. (S4, ep 10) RATING: AA

The Mystery of Tut's Tomb: Archaeologists investigate Tutankhamun's small and poorly decorated tomb. Why was the Boy King banished to such a mediocre tomb? RATING: AA (S3, ep 4)

Deadly Delivery: Facing poor visibility, a cargo flight is on final approach to an Alabama airport when it hits a grove of trees and crashes. What went wrong? RATING: NU7

28 Seconds To Survive: Investigators struggle to access the site where a Santa Barbara Airlines Flight crashed in 2008. Can they gather enough evidence to prove what went wrong? RATING: AA

Not My Meth: A mother travelling with her children to El Paso is caught with kilos of cocaine hidden in her car, while a boat carrying 388 kilos is chased down. 7+. (S7, ep 2)

Hash Smugglers: The first drug that Mariana was exposed to growing up in Portugal continues to be Europe's favourite. Hash - the seemingly 'soft drug' - holds a dark secret. 16+. (7 of 10)

Pilot Vs Plane: Looks into the 1988 Habsheim Airshow, where the maiden Air France flight of the new Airbus A320 dived into a forest and became consumed by flames. (S8, ep 3) RATING: NU12