National Geographic HD

In this enhanced episode, an inside look at the auto theft epidemic plaguing America.

In this enhanced episode, every other drug used in Thailand is overtaken by a candy-colored pill.

Wall Street drug dealers attempt to be the first to close a sale; enhanced episode.

An exploration into ecstasy's underworld.

Inmates find ways to get illicit drugs inside jailhouse walls.

Regain independence and enjoy greater mobility with the compact design and long-lasting battery of portable oxygen.

Meet the new Shark PowerDetect Upright Vacuum with features like DuoClean Detect Technology, self-cleaning brush roll and odor neutralizing and you will be cleaning faster, smarter and better!

Save thousands on car repairs.

Meet the new Shark PowerDetect Upright Vacuum with features like DuoClean Detect Technology, self-cleaning brush roll and odor neutralizing and you will be cleaning faster, smarter and better!

Meet the new Shark PowerDetect Upright Vacuum with features like DuoClean Detect Technology, self-cleaning brush roll and odor neutralizing and you will be cleaning faster, smarter and better!

See how one company is changing people's lives by helping them put their tax problems to rest.

Whistleblower testimony reignites a decades-long fight for transparency.

Commercial pilots come forward about their encounters with UFOs.

Scientists unveil cutting-edge technology helping in the search for UFOs.

People talk about close encounters they've had with UFO phenomena.

Reports from people who say they've been abducted are explored; a Harvard psychiatrist who takes them seriously comes under attack.

No longer waiting for the government to share data, citizen scientists and private groups amplify the search for answers.

Nepal is hit by a 6.7 mega-earthquake that kills thousands; across the country, survivors are hit by terrifying avalanches that destroy everything in their path; presenting stories of survival, from the Kathmandu Valley to Mount Everest.

The story of the largest wildfire in Portugal's history and how it devastated a rural community; as firefighters tried to control the blaze, fierce winds combined with the fire to make it unstoppable; fleeing locals are caught in the inferno.

Montecito is hit by a natural disaster that leaves its residents fighting for their lives; overnight, the Californian beach town is swamped by a series of 30-feet high, boulder-filled debris flows that destroy homes and leave streets swimming in mud.

On Oct. 1, 2015, the cargo ship El Faro is on a regular run to Puerto Rico when it disappears in a Category 4 storm called Hurricane Joaquin; it is determined that the El Faro sank off the coast of the Bahamas with 33 crew members.

A mine collapses in Chile, trapping 33 miners almost half a mile underground.

In April 2011, 360 tornadoes ravage the southern United States in four days, killing 348 people.

Fails include an overpass fire, a downed radio telescope and a sinking airport.

Fails include a disastrous shuttle mission, and an unwanted and very expensive airport.

A mine collapses in Chile, trapping 33 miners almost half a mile underground.

Fails include an overpass fire, a downed radio telescope and a sinking airport.