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.

Jake gets struck by a high-drama outback emergency, Brownie is in trouble after his trusty 907's engine blows up, and Scotty struggles to hit a 9pm cattle unload curfew.

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.

Lobster season explodes to life with no quotas and no second chances, William pays the price for being unprepared, and Adam and Steven scramble to finish their crab quotas.

A vast sinkhole swallows a van in New York, a massive blast rocks a San Juan suburb in Puerto Rico, and an earthquake tears into an office building in New Zealand's capital of Wellington.

Leigh outfoxes Donnie and Dennis and wins the rights to Matt and Damo's gold-rich land, and can Gold Coast socialites Richie and Kimberley get their new washplant to site without damaging it?

The Poseidon Crew dodge raging bushfires, the Gold Gypsies set out on a dangerous night-time detecting mission, and Shane and Russell push their fragile wash plant to breaking point.

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.

Avery discovers a 1942 Harley-Davidson buried among Mike's junk while Mike helps Cassidy's off-road dreams come true.

Ken and Guillaume face breakdowns as a crew member goes AWOL, Bernie's move to Snow Creek seems to be paying off - if he can get his sons to step up - and Al's streak is threatened.

The Poseidon Crew hit the jackpot after being forced to detect just to survive, the Goldtimers' rookie season goes from bad to worse, and the Dust Devils unearth a million-dollar reef.

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 harbours are bustling and it's all hands on deck; as countless ships arrive, one fisherman fights to head out before the season closes.

Anthony and Jodie finally install the ladder in their unused shaft and Matt and Amber start digging underground on their new claim; will their investment pay off, or have they bought a dud?

Ken and Guillaume face breakdowns as a crew member goes AWOL, Bernie's move to Snow Creek seems to be paying off - if he can get his sons to step up - and Al's streak is threatened.

The Gold Devils return to their Fair Lady lease in pursuit of their 1000-ounce target, and the Ferals face a standstill when their excavator is seized by rivals.

The Poseidon Crew battle to run two leases simultaneously in a bid to meet their 1000-ounce season target, and Alan and Salty brave uncharted waters and make a significant discovery.

In Denmark, engineers battle icy seas, powerful currents and punishing deadlines to build a four-kilometer-long mega bridge that will form part of a major new European transport link.

Donnie finds out that his old business partner is using his trademarked mining logo for his new tourism venture; at the 1870 mine site, Richie is worried that mining manager Dan has lost his mojo.

Witness the explosive tactics of the McNamara brothers in 1910 in LA, explore the dark world of China's illicit antiquities trade, and dive into the hacking feats of John Draper ('Captain Crunch').

Snow, ice, and a deadly mountain road push Dale to the edge as he fights to stay in control and keep his business moving forward.

Diehard's Michael and Cherie head out to their neglected surface claim to try their luck, and Ray and Paul's trusty old drill rig has blown its engine and the only option is to completely replace it.

The Wildcard crew battles sharks, a giant crocodile, a chronic injury, arguments and persistent fog that all threaten to derail reaching their season target.

Winter storms cripple the Gold Retrievers' new dryblower, wet paydirt forces Shane and Russell to shut down their plant, and the pressure to find gold could finally tear the Ferals apart.