Parker tests virgin ground on the Fitzgerald claim and makes a big discovery, but he must gain the trust of the family if he wants to strike a deal.

Parker prospects the Fitzgeralds' virgin ground and makes a big discovery; in Montana, Dave and his crew risk the claim owner's trust when they cut a fence to access ground; The Dirt returns with Parker and Dave's teams.

In the legendary Palmer goldfields, Parker and his team encounter a lucrative family-run mining operation and discover dirt far richer than anything they've ever seen in the Yukon. But convincing the family to lease him virgin ground will come at a price.

Tempted by the largest nuggets he's ever seen, Parker ventures deep into an underground mine; Tyler tracks down a trommel for the team and a local miner lets the team test a claim that yields more gold per yard than Parker's ever seen in the Yukon.

As the Yukon freezes, Parker Schnabel sets his sights on buying a gold-rich claim in Australia; with the help of third-generation Aussie prospector, Tyler Mahoney, Parker takes his team Down Under in search of ground he can mine year-round.

The glory hole caves in around the 100,000 pound excavator; Jack puts his life on the line.

To get to the bedrock and gold, Todd and Jack try to dig deeper.

The claim's owner brings in a veteran outsider to turn the operation around.

Gold recovery expert tries to help; Todd discovers a flaw in the equipment.

The miners need to find $10,000 worth of gold or their families will be sent home; Dorsey struggles with the wave table.

The equipment malfunctions and the operation is brought to a halt.

The team tries to run dirt through a wash plant; families question the lack of gold; tension builds.

The crew races to set up the mining plant and start running dirt; tensions build over the lack of gold and an ill mechanic.

A mechanical accident threatens to close the greenhorn mining season.

When the going gets tough, the tough seek new frontiers; six recession-hit patriots from Oregon become greenhorn gold miners.

Parker prospects a claim owned by a tight-knit family with more gold than anything he's seen in the Klondike. In Montana, Freddy Dodge puts Team Turin on rich glacial gold. The Dirt goes behind the scenes with Parker's crew and reveals Team Turin's MVP.

Parker seeks a gold-rich claim in Australia he can mine year-round; Aussie miner Tyler Mahoney leads Parker to the richest ground and largest nuggets he's ever seen; at Birdseye Mine in Montana, Freddy Dodge gives Team Turin a major new lead.

Rugged terrain pushes Parker's heavy machinery skills to their limit, forcing him to attempt one dangerous maneuver after another in his quest to open a legendary lost gold mine.

Driven to find a lost gold mine, Parker joins forces with the grandson of a legendary gold miner in search of a hidden El Dorado lost since World War II.

Parker navigates the volatile and lawless town surrounding Porgera, one of the world's largest and most profitable gold mines, as he and the team try to gain access to the huge gold pit.

Parker embarks on a quest to find better land for a local mining operation and races to build a custom piece of mining equipment that will limit exposure to a deadly chemical used to extract gold.

Back where their gold-mining adventures began, "Gold Rush" alumni Dakota Fred and son Justin persevere in the face of long odds, risking their lives for a fortune they may never realize. Assisted by a team of intrepid divers, mountaineers and bush mechanics, the Dakota Boys explore the white water rapids of McKinley Creek in Alaska, diving deep in raging torrents with a suction dredge. Not only could one wrong move prove deadly, but the guys also face wild animals, extreme temperatures and hypothermia.

The gold rush in Alaska isn't confined to the state's precious ground. It's taking place on the sea ... or more accurately, on the bottom of the frigid Bering Sea. This series, from the creators of the Emmy-winning "Deadliest Catch," follows four gold dredges and their eccentric and driven crews who risk their lives to find as much gold as possible before winter sets in and it's too dangerous to dive. The custom-built rigs, some barely seaworthy, include an 80-foot barge run by the most successful gold dredger in Nome, Alaska, and a modified skiff that seats only two people.

"Yukon Gold" follows four gold-mining crews who have merely four months in Canada's wild Yukon to earn a big payday. Fighting an impossibly short mining season and with their savings on the line, they work against difficulties to dig the precious ore out of the ground. The crews battle mechanical breakdowns, the elements and 18-hour days under the midnight sun -- all because of gold fever -- and it keeps them coming back year after year for another chance to wager it all.

Despite striking it rich mining in his home state of Alaska, "Gold Rush" star Parker Schnabel isn't satisfied. He's always wondered if he could follow in the footsteps of his forebears and take on the legendary Klondike Gold Rush trail. Wonder no more. In honor of his family -- especially his beloved grandfather, who always inspired him to push beyond his limits -- Parker attempts to mimic a journey that killed thousands of brave souls in the late 19th century. As winter closes in, he begins the trek across the Coastal Range and works his way to the fabled goldfields of the Klondike. He's joined by his foreman, Rick Ness; wilderness guide Karla Ann, who once worked with Parker as a rock truck driver; and cameramen James Levelle, who has known Parker for years.

Tradition collides with transformation in McCarthy, Alaska. The isolated town -- once considered to be the state's version of "Sin City" -- flourished during the Gold Rush but is now home to roughly 40 people, a mix of mavericks, risk takers and rabble rousers willing to brave extreme conditions to live free. While some believe in continuing the town's frontier way of life, others feel the future of McCarthy depends on dragging it into the modern age. Long-standing resident Jeremy Keller fights to protect its roots, while Neil Darish has purchased multiple properties in town and plans to restore its vibrancy. "Edge of Alaska" tells the story of a hinterland at a crossroads.

In Discovery Channel's top-rated show "Gold Rush," gold miners, inexperienced as some may be, hope to strike it rich in the wilds of Alaska and beyond. Some dismal summers result, filled with injuries, malfunctioning equipment and constant fighting among the greenhorn miners, yet serious cases of gold fever always trump any talk of giving up and sometimes leads to dreams being salvaged. The companions series "The Dirt" presents the inside scoop on behind-the-scenes relationships between such miners as brash youngster Parker Schnabel and longtime Yukon resident Tony Beets, as the quest to hit the mother lode never stops.

The breathtaking beauty of Alaska sometimes hides the fact its winters can be incredibly harsh, especially for those who live in the state's outlying areas. "Alaska: The Last Frontier" perfectly illustrates this reality, as the series profiles life for the Kilcher family in the isolated community of Homer. For four generations the Kilchers have lived off what their 600-acre homestead has provided, but cultivating that living is never easy. Led by patriarch Atz Kilcher and his brother Otto, the family spends the short summer and fall gardening, hunting and fishing for food, gathering supplies from the land and preparing their animals for the winter. Viewers, who may or may not have a fancy phone by their side while watching on their big-screen high-def TV, also see the Kilchers living off the grid, where running water and electricity aren't daily staples, nor is contact with the outside world. Atz, by the way, is the father of music superstar Jewel.

Before complaining about the market price of Alaska king crab, check out this gripping documentary series, revealing the mortal perils and intense discomfort that fishing crews face on the Bering Sea to catch the delicacy. Those perils include 40-foot waves, 700-pound crab pots that can easily crush a careless crewman, and freezing temperatures around the clock.

According to a legend that dates back to the 16th century, a cache of Incan gold worth hundreds of millions of dollars is hidden off the coast of southeastern Brazil. It's known as the "Treasure of the Trinity," and it's eluded all who have sought it for 500 years. But a modern-day team of explorers follows a radical new theory to uncover its whereabouts: a remote, treacherous island where thousands of deadly vipers roam. Cork Graham leads the expedition to Queimada Grande -- known to locals as Snake Island -- armed with advanced technology to unearth complex clues and decipher puzzles that have protected the treasure for centuries. This Discovery series takes viewers along on the epic journey to one of the most dangerous places on Earth.