National Geographic HD

A trip to the Big Sandy Machine Gun Shoot leads to a lucrative deal for antique arms dealers Christian and Alex. They also divide over a huge business decision.

With only three weeks of the season left, the captains are forced into a turf war with the competition which makes landing anything even more difficult.

Three different accidents reveal that a lack of maintenance can cause a catastrophe. A human error leads to a disaster during a flight to Texas. When a turboprop engine disappears in the sea, investigators discover a criminal empire.

Any small mistake during take-off can have disastrous consequences. In Taiwan, a Boeing 747 crashes on the runway. In Detroit, a DC-9 leaves a trail of burned debris.

What can an ancient skeleton reveal about the settling of the Americas?

Thord becomes part of a crime scene investigation and rookie Andrej is faced with an overloaded car.

Military experts Alex and Christian promise big things to a client in return for $40,000. However, to meet the deal, they'll need to achieve the near impossible.

With only two weeks left in the season and a narrow margin separating the top four boats, the captains compete for the vital catches that could decide the victors.

Max and Mischa attempt to turn themselves into superhumans with wearable technology, including robotic exoskeletons and jetpacks.

Max and Mischa dive, glide, pedal and cruise into the future of personal transport, and take on a challenge to build their own personal flying machine.

Exploring the origin and technical creation of some of the world's cutting-edge technologies.

Three crews experience the same devastating event, but with radically different outcomes when an engine falls off their commercial airplane.

Three catastrophic runway collisions raise the same pressing question of how two planes could end up on the same runway at the same time.

Oil worker Steve bought his Aston Martin DB6 for a bargain price over 20 years ago. Since then, the car has been his pride and joy. However, when it broke down his attempts to repair the Aston failed.

Through user-generated videos including soccer playing, getting thrown in the air and fooling around with mousetraps, host Richard Hammond examines how shifting forces can cause unwanted acceleration, how to generate velocity through compression and how elastic potential energy can be very painful.

Calamitous clips prove why dancing on tables, pulling wheelies on quad bikes and sliding on the floor can all end in humiliation and injury.

Venice, 'the queen of the Adriatic', conquered the eastern Mediterranean. Shipwrecks reveal how this canal-drenched city became an economic powerhouse and what caused her downfall.

A look at how some foods are made in food factories including super-sour candy, maple bacon chocolate pods and sauerkraut.

A look at how some foods are made in food factories including pickles, fizzy drink tablets and bliss balls.

Humankind's insatiable appetite for meat throughout history, effects on the food chain and landscape, and solutions for keeping up with the demand.

In San Francisco, sourdough, a type of naturally leavened bread, is reviving the bread-baking scene, causing local bakers to deviate from standard grain-based breads.

Students begin an intense journey to ISEF; before they can advance to the international science stage, they have to compete in local fairs.

Brilliant strategist Morgan takes humans, treasure and towns without mercy.

Humankind's insatiable appetite for meat throughout history, effects on the food chain and landscape, and solutions for keeping up with the demand.

In San Francisco, sourdough, a type of naturally leavened bread, is reviving the bread-baking scene, causing local bakers to deviate from standard grain-based breads.

Students begin an intense journey to ISEF; before they can advance to the international science stage, they have to compete in local fairs.

Brilliant strategist Morgan takes humans, treasure and towns without mercy.

Max and Mischa attempt to turn themselves into superhumans with wearable technology, including robotic exoskeletons and jetpacks.

Max and Mischa dive, glide, pedal and cruise into the future of personal transport, and take on a challenge to build their own personal flying machine.

Exploring the origin and technical creation of some of the world's cutting-edge technologies.

Oil worker Steve bought his Aston Martin DB6 for a bargain price over 20 years ago. Since then, the car has been his pride and joy. However, when it broke down his attempts to repair the Aston failed.

Through user-generated videos including soccer playing, getting thrown in the air and fooling around with mousetraps, host Richard Hammond examines how shifting forces can cause unwanted acceleration, how to generate velocity through compression and how elastic potential energy can be very painful.

Calamitous clips prove why dancing on tables, pulling wheelies on quad bikes and sliding on the floor can all end in humiliation and injury.

Thord becomes part of a crime scene investigation and rookie Andrej is faced with an overloaded car.