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Blood And Treasure. When Sig and Mandy disagree on a fishing strategy, Clark is caught in the middle. Wild Bill comes down hard on deckhands as Linda gets too close to danger. S19, Ep6

Mystery Of The Serpent Mound. Rob Nelson investigates mysterious tunnels under Denver's airport. Plus, in Ohio he tries to uncover the secrets of a giant serpent-shaped mound. S1, Ep2

St. Andrews Church Spires. The team helps save copper elements from a Catholic Church. Plus, Grace, shows off her skills by building a bookshelf from a panel door and old tin. S3, Ep13

Geyser Gulch. The team salvage Geyser Gulch at Silver Dollar City in Missouri. Key items include a water tower, air pressure guns and a blue slide. S4, Ep1

Ship Of Fools Part 2. Shawn has a breakthrough in his negotiations to buy the inland mine. Kris endures a hard day in Elim, while Zeke suffers a devastating back injury. S10, Ep8

Still Imploder. In a rare lapse of judgment, Richard implodes Daniel's $3,000 copper still. As the fire marshal ramps up his investigation, Josh makes a tough decision. S12, Ep8

Teleshopping.

Teleshopping.

How is plasterboard made from power station smoke? How do they cast the world's top awards? How do they build a plane that can take off and land almost anywhere? S11, Ep17

How do they make car windows to keep out wind and rain, stones and thieves, and even noise and harmful UV rays? And, how do they put the gloss on lipstick? S11, Ep18

Turbos & Tailgates. Andy loves a crazy car concept, turning an old ambulance into a Maryland sports-mobile. Then, he thinks outside the box to soup-up a car for his buddy in blue. S3, Ep9

Two For The Road. Andy calls in help to get his 1932 Roadster up and running. Another project faces problems - combining parts from two Chevy trucks into a single 'FrankenTruck.' S3, Ep10

Come Nuggets Or High Water. Rick risks flooding Rally Valley to haul in big gold nuggets. Plus, Kevin's biggest machine goes down while another lights on fire. S15, Ep6

Brother Vs. Cousin. Sparks fly when Tony leaves his son with Cousin Mike. Desperate to get the gold flowing, Parker digs a mega ditch to fire up again on Dominion Creek. S15, Ep7

Callout Fallout. When the frame on Heavy D's 'quick flip' is unsalvageable, he turns it into the ultimate mud truck, and Chavis takes his custom race truck to a competition. S1, Ep9

There Will Be Mud. The Dieselsellerz crew race to finish their monster mud truck, and The Muscle rushes to get a buyer for the Denali he bought without Heavy D's permission. S1, Ep10

Frozen. Battered by the ice pack, Sig changes tactics deploying an experimental bait from Norway. On the Time Bandit, frustration boils over as Freddy tests Johnathan. S18, Ep21

Graveyard Of Gear. With intense currents holding back the Arctic ice pack, Keith struggles to retrieve his catch. Jake and Sean face losing everything when ice swallows their gear. S18, Ep22

How do they make cheddar, the world's most popular cheese? How do they breathe life into Rususci Anne - the plastic woman that teaches CPR? S14, Ep9

How do Ford produce the ubiquitous white van, the Transit? Plus, how do they ensure the Driza-bone coat lives up to its name? S14, Ep10

How do they make wood-burning stoves that bring warmth to the Norwegian winter? Plus, how did they build the synthesiser that changed music forever? S14, Ep11

How do they assemble the reinvented Morgan 3 Wheeler? Plus, how do they protect firefighters' hands from heat, flame and chemical attack? S14, Ep12

Raney Returns: Broken Bridges. Marty responds to a new, desperate plea from the Bower Family in eastern Vermont: a 100-year flood has wiped out their property access route. S6, Ep11

Triumph Dolomite Sprint. It's the 50th anniversary of one of British motoring's forgotten heroes, the Triumph Dolomite Sprint. So, of course, Mike and Elvis have to get one. S18, Ep1

Porsche 911. Mike and Elvis take on a Porsche 911 in rough shape: it turns up in pieces on a trailer. If they can revive it, they'll take it on an epic drive through the Cairngorms. S18, Ep2

Playing With Fire. Fires threaten to shut down one of Parker's claims. Rick decides if he'll move back to Vegas Valley. Tony loses big money fighting a wash plant issue. S16, Ep9

When Parker Met Rick. Rick Ness took a job working on 16-year-old Parker Schnabel's gold mine. The team brings in millions in gold, but a falling out changes everything. S16, Ep2

Lost Tomb Of The Viking King. Josh chases the treasure of legendary Viking Harald 'Bluetooth' Gormsson. The discovery of a mysterious gold artifact sends Josh through Scandinavia. S8, Ep2