Falling behind schedule in the Camp Cut, Big Al pushes Hiro to his limits in a desperate attempt to start sluicing.

Steve battles flooded highways when his truck breaks down and leaves him stranded, and tensions flare when trainee trucker Danyelle gets a driving lesson from her husband.

A disastrous fire cripples the Goldtimers' season, Marcus and Linden gamble on a new lease and expensive machinery, and the Ferals are forced to launch a rescue mission when Rob goes missing.

Jacqui and Andrew are stranded in the Palmer River region, Shane and Russell could finally hit a rich patch of nuggets, and the Poseidon Crew face a critical meeting.

Gale-force winds tear across the outback, causing pandemonium for bull catchers; when hats and helicopters are tossed around by 40-knot winds, Kurt must weigh his goals against the safety of his team.

Competition hits Rust Valley, Avery crashes into his new role as shop manager, and Mike struggles to finish a 1966 Pontiac Parisienne.

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.

Mountains are one of the greatest challenges a railway faces; we investigate daring railway engineering, from tunnelling through the Swiss Alps to a 19th-century engineering masterpiece in Australia.

The team explore a 100-year-old mining claim using cutting-edge technology, and a family connection leads Tanya one step closer to the enigmatic Lasseter.

The Victoria Diggers' gold run dries up, Marcus and Linden suffer an injury that could end their trip, and the Dust Devils battle breakdowns to produce the biggest gold pour of the season so far.

The Poseidon Crew dig for gold in century-old mine shafts, the Gold Gypsies struggle with an excavator breakdown, and the Goldtimers take a gamble on a new lease.

Ed and Riley's hunting plans are interrupted when their new sluice plant needs a major overhaul.

Irv finds the holy grail of VW: the Beetle. It's just miles from his garage, so he makes it his mission to breathe new life into this 75-year-old cable-break classic.

The Desert Diggers secure a season-changing deal, the Poseidon Crew expand operations at German Gully to find big gold, and intense summer heat pushes the Wanderers to the brink.

The Poseidon Crew call in a trusted ally as time runs out, the Mackies detonate explosives to obliterate impenetrable rock, and Jacqui and Andrew gamble everything.

Summer is in full effect, and that means that Integrated Operations is moving into the final phase of their project: loading four million dollars' worth of timber onto a giant floating barge.

Skipper Rick takes the Crane's Legacy out to sea at the start of lobster season; after a sudden drop in the number of catches, he soon realises that poachers are cutting into his action.

Ken and Guillaume's plan to get two sluice plants running comes crashing down after one falls off a truck and the other spins itself into disrepair.

The Ferals are on the gold when a four-wheeler crash leaves them a man down, and the Poseidon Crew battle to overcome a catastrophic mechanical failure.

The Gold Devils pin their hopes on an exploration mission to a rugged outback lease, and flood waters wreck the Gold Retrievers' new plant.

Irv finds the holy grail of VW: the Beetle. It's just miles from his garage, so he makes it his mission to breathe new life into this 75-year-old cable-break classic.

While Dale struggles to run the family farm and his business, Gripp gets a call from his sister after a terrifying crash and races to help.

US special forces target Somali clan leaders in Mogadishu. After capturing two lieutenants, two Black Hawks are downed, and pilot Michael Durant is captured. Mike Durant is rescued.

In spring 2004, during the Battle of Najaf, Marines, including Brent Downing, fought to clear the Mahdi Militia. The militia retreated to the Imam Ali Mosque. A ceasefire halted the assault.

The Mahoneys hunt in the remote wilderness of one of the world's most uninhabited regions and the Victoria Diggers navigate a multi-million dollar joint venture.

Victoria Diggers Neville and Mick are desperate to capitalise on the super-fine gold embedded in their dirt and rock, and the Mahoneys head out and battle the extreme heat of the Kimberley.