Tensions rise as the mining season hits its midpoint. The Kellys launch the All-In, and Zeke hits "the cheese." But Shawn struggles to find a pay streak, and an alleged claim jumper sets up on the Tomcod Claim hotspot.

The fleet goes for broke as Kris launches his crawler deeper than anyone has ever mined. Shawn must haul massive, season-saving equipment through a rising river, and Chris makes a historic discovery: the biggest gold nugget ever found offshore from Nome!