Discovery Channel HD Wednesday

Developments in the manufacture of pipe cleaners, blue Stilton cheese, smart electric meters and telescopes

Developments in the manufacture of fish replicas, siren systems, pre-packaged sandwiches and candlesticks

A look at a family-run airline in Alaska that battles the Arctic elements to transport supplies and people to some of the world's most inaccessible areas

Luke flies dangerous chemicals to a remote village, and when winter claims its first victim in Unalakleet, Jim makes arrangements to transport the casket

Tony considers moving the entire family operation to the Indian River. Plus, Rick Ness brings on a new crew member, hoping to get on the gold first

After years of not speaking, Rick asks Parker for a favour. Tony pressures his son to lead the move to Indian River and Parker finds gold in an unlikely spot

Mike and Elvis engage in the ultimate Aussie showdown: Ford versus Holden. Can their Ford XR8 outpace the Holden GTS at the Mount Panorama circuit?

Mike and Elvis find a 1970s classic VW camper in need of some mechanical TLC. Can they turn it into a long-range camper fit for the Australian wilderness

The Kellys must find gold to pay off their debts. Shawn moves his camp in search of the motherlode, and Vernon's diver tries to mine without a light

Shawn is driven to desperate measures to solve his water overflow problems. Meanwhile, Vernon follows the gold trail despite dangerous ice conditions

Hunter runs pay dirt from a promising new location called the Plateau. Todd calls the Alaska Troopers when Framer goes missing on a solo caribou hunt

When the Black Pearl's trommel motor catches fire, Todd's crew attempts to modify the smaller wash plant Jack built decades ago to run more pay dirt

A builder constructs a modular home high on a cliff off the coast of Vancouver. Even a small mistake could result in the home tumbling down into the ocean

The collectors compete for lost luggage found by police in Glasgow, Scotland

The collectors attend the supposedly largest lost luggage auction in the world at Miami International Airport in Florida

Car dealer Mike Brewer and mechanic Marc Priestley trade up to an iconic off roader, a Series 2A Land Rover, for ex-soldier Tony

Steve Dulcich returns along with the Vanishing Paint Challenger. Derek and Steve switch out the gearbox and go to a local road course

Pennsylvania locals go all-out for $5,000. Whoever goes all the way will be racing against Axman, who is known for never backing down

Back at Zweifel Motors in South Dakota, Derek has stashed the cheapest 1970 Pontiac GTO he could find but unfortunately it was cheap for a reason

With an access tunnel to an underground cavern finally opened and a tantalising clue discovered, Duane's son Chad takes a risky dive into the flooded cave system

Realising they may be targeted by a police stakeout, Mark and Digger prepare for the worst. Howard drinks Tim's last bottle of decades-old rye elixir.

Pennsylvania locals go all-out for $5,000. Whoever goes all the way will be racing against Axman, who is known for never backing down