Big Al races to open up virgin ground, but his operation grinds to a halt when Hiro's Curse returns.

Yogi prepares for a showdown with transport police in South Australia and Nick and Jo take on one of their toughest jobs yet on one of Australia's worst roads.

Machine breakdowns threaten to cripple the Gold Timers' season, and the Ferals r-join the hunt and face a medical emergency as Linden finally breaks his gold drought.

The final week of the season: the Dust Devils' disastrous season goes from bad to worse, Shane and Russell battle the heat, and the Poseidon Crew unearth a nugget that catapults them to target.

New recruit Sherl hopes to restore faith with his bosses on Team Cook, and Clarry's Indigenous clients dream of building a new life on their ancestral lands using proceeds from caught bulls.

The Rust Bros crew make an explosive comeback, but Mike faces demons from his past when they tackle a 1968 Camaro and 1966 Super Bee.

Orca research, ancient K'ómoks fish traps, and a salmon hatchery - on BC's coast, the past is teaching the future how to survive.

We explore the wilderness lines that have pushed the frontiers of human endeavour into previously unknown territories, from a train that travels through a mountain to a jungle railway.

Jeff recreates an historic flight in search of vital clues before an archive discovery drops a bombshell.

Shane and Russell risk running out of water and crippling their operation, the Victoria Diggers are almost out of ground to dig, and the Gold Gypsies weigh up a life-changing decision.

The Goldtimers hire a 7-tonne loader in a bid to end their gold drought, the Dust Devils risk running out of water, and Marcus disappears while clifftop detecting.

Big Al's health takes a hit while searching for new ground.

John has wanted an Alfa Romeo Spider ever since watching Dustin Hoffman drive one in the film 'The Graduate', and now he is taking the plunge after a health scare.

Intense heat pushes Jacqui and Andrew to their limits; high winds threaten the Desert Diggers' relocation plans; Shane and Rusty battle breakdowns and brutal conditions to keep their operation alive.

Brent tests the mining skills of his late friend Neville Perry's sons, a mechanical fault stalls the Wanderers' excavator, and the Mackies make a risky investment on new ground.

A simple scrapyard trip becomes a winter nightmare as Dale and Gripp battle snow, ruts, and wrecked gear on a remote mountain road.

Veteran skippers hustle to maximise crab season while as researchers work quickly to stop the spread of an invasive species that threatens marine life across the island.

Guillaume battles rocky ground on his own while Ken is home for the birth of his son.

The Ferals hit a run of nuggets that could transform their season, the Gold Retrievers are rocked by a medical emergency, and Marcus, Linden and Dale try to salvage a disastrous season.

Ryan collapses in a heatwave before the Ferals uncover a massive haul of gold, the Poseidon Crew's site is swamped after a brutal storm, and Shane and Russell uncover the biggest nugget of the season.

Irv is a world-renowned expert in VW Sambas, so when an American collector turns to him with a bunch of rusted panels, and the dream of a showroom quality vehicle, there's only one man for the job.

Shane and Russell chase lost gold on Mosquito Creek armed with new information; disaster strikes the Desert Diggers; Jacqui and Andrew push deeper into the Palmer River using a new off-road vehicle.

Aviation's ultimate nightmare is when the plane itself lets you down; even though every component is tested and retested, it's impossible to totally eliminate mechanical failure.

In their final week, the Wildcard crew is more than two tonnes short of their 65-tonne goal; with sharks circling at Cape Carnage, they fight for their last chance at a killer catch.

The scallop fishing season kicks off on the Magdalen Islands, but day one is marred with equipment failure and rough seas for Captain William while a gale-force storm targets Captain Adam.

A rare solar eclipse disrupts the catch, Steven's gear fails, Adam's crab chasing leaves him on fumes and rookie captain Kevin struggles through his first day behind the wheel.