Discovery HD

Johnathan delegates dentistry duties when his brother's dental implants fail at sea. Rick reverses course after his greenhorn suffers a head injury.

It's been tipping over for 800 years - what's the gravity-defying magic behind Pisa's leaning tower? And, how are chocolate digestive biscuits manufactured.

How did the ancient Greeks invent parchment with techniques still used today? And how do they make shuttlecocks, the fasting moving object in sport.

How do they make smooth writing ballpoint pens that don't leak or fade? And, how do they make pizza for soldiers on the frontline.

In Cremona, how do they make modern violins that sound as good as the legendary Stradivarius? And, how do they build houses with volcanic rock.

Dr. Jeff and Petra train new vets at a wildlife sanctuary in Mexico. While there, they spay an endangered jaguar, and help an injured osprey.

Jeff. Dr. Jeff performs a surgery he'd never done before on a dog with laboured breathing. Meanwhile, Dr. Baier saves some neglected ornate box turtles.

A dog is rushed to the clinic after being hit by a car. Four rats must be neutered before adoption and a little girl rescues kittens in Grand Junction.

He's In The Water! When Wizard deckhand Lynn Guitard goes overboard, Keith and Monte scramble to rescue him. Sig lets Sophia prove herself at the Russian line.

Greenhorn Todd's abscessed tooth forces Rick to consider a costly return to port. Sig gives protégé 'Bob' the helm for her first-ever opilio season.

As Arctic ice wreaks havoc on the fishing grounds, Rick risks losing a fortune in crab pots. Johnathan tests the Time Bandit's reinforced bow.

Those In Peril On The Sea. Captains Sig and Sophia shift their strategy as injuries plague the Northwestern deck crew. Jake loses power in heavy seas on the Cornelia Marie.

Sig and Sophia score some hybrid crab, but a tank imbalance risks capsizing the Northwestern. The Time Bandit crew races incoming ice to get OJ home.

Sig races to jettison pots to repair a flooding compartment below deck. Rick enlists the Time Bandit to hide hot fishing until Jake calls their bluff.

Tony digs out a dozer and two trucks in the Midas Cut. Parker pushes to get his second wash plant running. Buzz struggles to assemble a new plant.

Builder Chase Morrill and his team rebuild an old oyster shack for a working farm. They have their tightest deadline to date and a budget of only $25,000.

Two renovators have purchased land in a remote part of Colorado. They plan on using a rammed-earth process to construct all-natural walls.

Stung by Patrick's criticism, Allison crafts debris into a fishing net. A tropical storm pounds the survivalists. A team must abandon their camp.

Josh chases riches stolen by British loyalists during the American Revolution and helps dig up a cache of coins plundered by the infamous Doan Gang.

Mystery Ruins Of The Stone Age. Josh investigates the shocking rumours surrounding a Turkish dig site 6,000 years older than Stonehenge. Josh finds evidence of tribal skull rituals.

Most Violent Event In The Universe. Experts uncover where a black hole's energy originates. They examine what happens when the two most powerful objects in the cosmos collide.

Lancia Delta Integrale. Italian rally legend Miki Biasion joins the boys as they transform a Lancia Integrale, like the one Miki drove to World Rally gold in the '80s.

In Montana, a family's friends call the Raneys to save them before La Nina weather strands them without a suitable cabin or food storage to survive.

In 25-foot seas, Sig's engine runs wild, Jake loses power, John's crane cracks, and Rick replaces a lacklustre deckhand with a returning favourite.

Mike and Ant turn around a 1965 Dodge Coronet 500, a high-horsepower veteran of the drag strip. They try and dial it back to a more useable street cruiser.

Mike's found a British motoring icon: a 1976 Land Rover Series III. One of the few registered in California, it's a rare find but Ant has work to do to get it moving.

Mike and Ant look back on their American adventure. Before they return home to the UK, they pack up the workshop and sort through the work of half a decade.

Mike finds his favourite iconic British car, a Mini Mark 1, in a garage in Wales. He and Elvis make some radical changes to get it back on the road.

Mike and Elvis take a gamble on a TVR Griffith. But first, they must pick it apart before restoring and testing this iconic sports car's full impact.

A family sets out to build an underground home in Idaho. Before they even pour concrete, they face a decision that will make or break their build.

After experiencing a devastating tornado, a family relies on the help of loved ones to build an off-grid retreat overlooking Tennessee's Ocoee River.

Despite having building experience, a couple faces new challenges while constructing a double container home at their donkey sanctuary in Missouri.

Oregon homesteaders find their dream in jeopardy following an accident. When the Raneys arrive, they find a dilapidated bridge has cut them off.

A young couple struggle to keep their homestead afloat in torrential Texas weather. The Raneys race to save the rain-hit cabin and livestock shelters.

The Raneys are in Maine to help a couple whose homestead is overrun with boglands. They build structures to help with the brutal winters.

The crew restores two cabins and builds a barn door for their blacksmith shop. Plus, Mark Bowe drives through a river to a fishing cabin he and the crew built.

A rare and powerful weather system races a thousand miles across the Great Lakes to unleash damaging tornadoes in Ottawa, Canada's capital city.

The shop is finally ready to take the Outlaw Porsche to its conclusion. Done in metal, the car starts in body and paint, then is ready for assembly.

Challenges mount at each stage of the Hot Rod build, and the upholstery shop changes up their routine as the client arrives for a long-awaited reveal.

While the shop has been perfecting the process in building the CF1s, word about the car has gotten out, and potential buyers are lining up.

Yugo 55. Mike tries to persuade a sceptical Elvis that a 1989 Yugo, beloved in its Serbian homeland, can rival its best-in-class contemporary, the VW Golf.

Chronic Lyme leads a homesteader to try bee sting therapy, but his plan unravels when the hive vanishes; his parents turn to the Raneys for help.

A crew member falls overboard on the Aleutian Lady. As captain and crew fight to save him, the dangers of the Bering Sea hit home for the fleet.

Tank You Come Again! Jackass producer Jeff Tremaine has trouble feeding the eels in his tank, the clients at Malibu Winery had a fire which caused damage to their outdoor aquarium.

Wayde and Brett build a beefed up tank for a jerky store. Next, the guys head to South Florida to install a pub themed tank for an Irish Family bar.

Freddy and Juan are in the Yukon to help a prospector and family man increase his gold recovery. If they succeed, they'll help secure his family's future.

Freddy takes on a solo mission with a father-son team in the Yukon. His fixes will determine if this family can mine together for another season.

Construction projects are stressful, especially if they are in the middle of nowhere. Incredible skill is needed to build on tricky terrain.

A father-son duo builds an off-grid home in Montana. The 720-square-foot home takes advantage of mountain winds by using a wind-turbine generator for power.

The officers take control of 200 chickens that are being kept in inhumane temperatures exceeding 100 degrees. Plus, they uncover a house overrun by 50 rabbits.

Animal cruelty investigators join forces with Texas police officers in an attempt to smash one of the biggest dog fighting rings in US history.

How do they keep you comfortable, entertained and safe with the latest aircraft seats? And, how do they design bras with aerospace technology to give you that extra lift.

How is plasterboard made from power station smoke? How do they cast the world's top awards? How do they build a plane that can take off and land almost anywhere.

How do they make car windows to keep out wind and rain, stones and thieves, and even noise and harmful UV rays? And, how do they put the gloss on lipstick.

How do they make George Washington's favourite tipple? How do they crash test aircraft seats without crashing a plane? How do they produce billions of batteries a year.

Monique steps up her game with a new sales tactic, Grant issues a manifesto to set his company on a new path and Elaine secures a big partnership.

Mike and Ant turn around a 1965 Dodge Coronet 500, a high-horsepower veteran of the drag strip. They try and dial it back to a more useable street cruiser.

The owner of Chase Morrill's latest cabin project works for a brewing company. The team uses it for inspiration as they remodel this waterfront home.

Tim and Tickle's duty-free deal is threatened when a stranger appears at their still site. Mark and Digger face buyer's remorse on a $70K deal.

The team searches for the Santa Compaña, an unholy horde of the undead terrorising rural Spain, leading them to a remote and ancient monastery.

Sig and Keith risk fishing far from land and encounter a gauntlet of Bering Sea weather. Johnathan strategically sets pots near a submarine volcano.