Tony Beets gambles millions to overhaul his operation. Rick Ness needs a wash plant that matches his big ambitions, while Dave Turin hunts for new ground.

Tony Beets battles the Klondike winter to secure a monster excavator. As the competition for ground heats up, Fred Lewis searches for the motherlode in Nevada.

Rick resurrects Monster Red to capture nuggets with help from Freddy Dodge and Tony builds a huge excavator. Dustin returns to Haines after a devastating landslide.

Tony sets his sights on a $3.5-million monster dozer. Dave hunts for a claim with his new Mad Max prospecting machine. Rick tests a pioneering drilling method.

Tony fights the Yukon winter to build a monster dozer.

Dave prospects a claim in Idaho but is in for a surprise.