Nat Geo HD Schedule, Today (United Kingdom)

Illegal Gambling: The legal market made 53 billion dollars in 2021 - but that's dwarfed by an illegal gambling underworld that makes roughly one trillion dollars annually. 16+. (S1, ep 3)

Aussie Ice Wars: In Australia, more users are turning to cheap crystal meth. Although biker gangs control the trade, the Chinese Triads are quickly gaining power. (S7, ep 10) RATING: NU18

Bite The Bullet: Reality series following a new breed of urban treasure hunters who are scouring America looking for precious metals in the most unlikely places. All ages.

Double Trouble: A look at how sweet and spicy ginger beer, cheesy portable pizza pockets and tart and tangy double lollipops get to the masses. (S2, ep 9) RATING: AA

From Sugar with Love: Discover how zesty peppermint puff hard candies, flaky cheese straws, fruity mango chutney, and sugary love hearts get to the masses. (S2, ep 10) RATING: AA

Haunted House Treasures: The crew dismantle a 150-year-old house but things get strange when they uncover creepy cages in the basement and a cryptic message on a wall. All ages.

Muscle Car Mansion: Brian and Eric arrive at the house they have been asked to tear down, only to find that it has been vandalised and its valuable contents removed. All ages.

A Flying Fox!: The entire zoo is on baby watch as Phoebe the elephant goes into labor. Meanwhile, a family of flying foxes get their annual exam. RATING: AA (S1, ep 11)

Good News Bears: The Columbus Zoo's new resident, a polar bear named Lee, arrives in Ohio and must get through quarantine. RATING: AA (S1, ep 12)

Teleshopping.

Teleshopping.

Teleshopping.

Teleshopping.

Teleshopping.

Use Your Noodle: A look at how slurp-worthy instant noodle soup, sweet and tangy barbecue sauce, and rich and fluffy marshmallow chocolate cups get to the masses. (S2, ep 12) RATING: AA

Chee Cha Sambur: A look at how how a warm, soothing Indian vegetable stew, light and airy crunchy Mexican puffs and a chocolatey-cheesy Russian treat are made. (S2, Ep13) RATING: AA

Ultimate Tech Three: Join Tim and Fuzz as they look back through some of their favourite moments engineering solutions to mechanical problems. 7+. (S5, ep 3 of 4)

Without Warning: When two float planes carrying tourists collide near a spectacular Alaskan waterfall, investigators turn to 3D technology to figure out why. U. (5 of 10)

Russia's Ice Hockey Disaster: Gripping investigation into the 2011 air disaster that killed an entire top-flight Russian ice hockey team. What caused the devastating crash? RATING: AA

High Rise Catastrophe: Investigators uncover a problem threatening every 747 in the sky as they delve into the worst aviation disaster ever to occur in the Netherlands. RATING: AA

Deadly Defiance: A decorated war hero volunteers for a dangerous role as America's 7th Infantry Regiment makes a bold bid to drive Nazi forces back across the Rhine. 12+.

Forest Hell: An American soldier must crawl through an enemy minefield to capture to German machine gun nests holding up his unit in the Hurtgen Forest. U.

Secrets of D-Day: Sonar technology heads beneath Normandy's waves for a powerful look at the hundred-plus ships wrecked during the largest amphibious invasion ever. RATING: AA

D-Day: Idris Elba unearths the stories of three heroes - these men were part of the only all-black combat unit to land on the Normandy beaches on D-Day. (1 of 4)

Road to D-Day: Matching archive film and photography to their original locations, witness the most extraordinary events of Word War II from a unique perspective. U. (S1, ep 1)

Hitler's Vengeance Weapons: In 1942, the Nazis develop the world's first cruise and ballistic missiles. Can the Allies stop Hitler before he rains down terror from above? U. (S1, ep 2)

Former slave labourers at the Sobibor death camp in German-occupied Poland discuss their lives as prisoners and share the story of their courageous escape on 14 October 1943. RATING: AA

Hitler's Evil Elite: Former members of Hitler's SS speak openly about their part in one of the most powerful and feared organisations in Nazi Germany. (1 of 2) RATING: NU12

Hitler's Killing Machine: Former members open up about their time in the SS - the paramilitary organisation ordered by Hitler to eradicate enemies of the Nazi regime. (2 of 2) RATING: NU12

Did drugs affect Hitler's actions and behaviour? Find out in this compelling documentary examining the medications the dictator was taking, how much he took and how often.

A year after Russia's invasion, this documentary charts the heroic efforts of Ukraine's people to defeat Russia's army in a war fought and observed from the air. 16+.