It's the final day of Bering Sea Gold's most difficult ice season, and Shawn makes one more epic dive to try and hit his goal. Young gun Chris races all-out for his biggest cleanup yet, and Vern relies on diver Gary to secure their ambitious summer plans.

With 72 critical hours left in the Bering Sea mining season, shifting ice cuts off access to Vern's diver under the ice. The Kellys hit a hot paystreak but are praying their repairs will hold up. Shawn hits bedrock and learns if his gamble paid off.

Gambling on his ice operation, Shawn must clear the ice on his gold-filled inland claim to avoid bogging down in summertime mud. A crew fight sidelines Vern's lucrative run. Chris makes a risky wager that will force him to double his gold goal.

Birthday boy Shawn Pomrenke boldly moves back to Tomcod. Fed up with a faulty sluice box, the Kellys resurrect an old piece of equipment called "The Coffin." Zeke finds a reef that could yield some great gold, and Chris McCully plans a marathon dive.

Shawn takes a pivotal leap of faith; Zeke reaches a critical crossroads after his family visits him at the mining site; Vernon's diver gets into a risky tangle under the ice; The Kellys initiate their fledgling diver.

Chris McCully pushes his fancy new equipment to the brink. Vernon and his rookie diver clash. A frozen regulator threatens Andy's life. Shawn casts a wide net to get his season going finally.

Shawn moves in on Vernon's spot on Claim 56 as the two miners chase the same paystreak, but only one will prevail. Zeke gambles with a move across the ice. Chris McCully hopes his failing pump engine will last. Kris Kelly faces a life-or-death situation.

A perilous plunge into deeper depths wreaks havoc on Chris McCully's air compressor. Shawn scours foreign ground for gold to keep his operation funded. A faulty sluice box could spell disaster for the Kellys.

Left out in the cold by his crew, Chris McCully risks an unprecedented winter solo dive without a tender. The Kellys look to continue their new hot streak, but hypothermia becomes a serious threat for one diver when equipment begins to fall apart.

Vernon's crew attempts their first dive on the frozen battlefield, but tempers explode. Zeke breaks in his season by revisiting a mining spot from his past. Shawn sends in his ace diver, and the Kellys make a much-needed breakthrough.

As Shawn takes advantage of an unexpected deal, Zeke must pivot his strategy when the Tomcod claim proves dangerously inaccessible. A mistake by his crew forces Chris McCully to rethink his operation as Kris Kelly contends with troublesome ground.

Chaotic El Niño conditions impact the ice, creating dangerous pressure ridges and flipping the gold miners' game plans upside down as some are forced off their claims.