Two monster dredges duke it out on the Bering Sea as a war brews between Shawn Pomrenke and Kris Kelly. Then Vernon Adkison's diver bleeds on his ascent, sending everyone into a panic. And Emily Riedel deals with mechanical difficulties, costing her time and money. Meanwhile, a notorious nomad returns to team with Zeke Tenhoff in the new episode "This Means War."