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After a disastrous trip to Elim, Kris needs a new plan to find gold. Shawn is nervous to test out the Myrtle Irene, and Vernon finds gold in Clara Creek.

The Poseidon Crew face intense pressure when a police incident pulls Ethan away. Plus, Alan and Salty brave uncharted waters in search of sunken treasure.

Lower temperatures force Dusty and the team to change strategies. Then, a run-in with his old rival throws the team off the trail and disrupts the search.

Winter erupts as Johnathan hunts for crab in a secret location to which he's won exclusive rights. Plus, Sig tries his luck at a derby fishery.

Darrell visits the Atocha, a valuable shipwreck Cooper recorded 50 years ago. Experts send Darrell to an archive in Spain to hunt down an ancient manifest.

Josh Gates dives into the mysteries of the Bermuda Triangle. He goes to the ocean floor, the skies and space to explore its intriguing disappearances.

To conclude his epic investigation, Josh Gates uses cutting-edge technology to investigate the Bermuda Triangle's most infamous shipwreck and lost flights.

The Raney family begin their most ambitious rescue ever. Marty attempts a dangerous river crossing to get expensive gear to the homestead.

One If By River, Two If By Air. Helicopter pilot Eric battles dangerous weather conditions on an aerial supply mission. Plus, Misty and Maciah work on an innovative greenhouse.

Drowning in a sea of overburden, The Blacklighters face off against each other as Mark's inexperience with the dozer proves too much for Paul.

On the eve of the famous Lightning Ridge Opal Festival, The Misfits battle to treat 150kg of matrix opal, forcing Cody to cook up a miracle.

With major repairs on the Time Bandit, Captain Andy is faced with a tough decision. Meanwhile, Mandy learns what it's really like to be a greenhorn.

A saboteur seeks an early end for the Cape Caution. Meanwhile, Cornelia Marie Captains Josh Harris and Casey McManus fight to regain control of their crew.

Crash And Berm. Marty re-rescues the Broadhead family, whose Ohio home was made from 30,000 tires and faces major new structural issues.