As Keith fights for his life at Anchorage General, Sig helps his brother Monte to get back on the crab. Aboard the Titan Explorer, Jake's deckhand is knocked out by 900 pounds of swinging steel. Rick's new engineer crosses a line he can't come back from.

In the Season 20 finale, four boats race to beat closing canneries as conditions intensify on the water. Sig suffers a major outage with hours to port; Jake uses his only gear to back out of trouble, and John doubles down on sea mammals, this time, orcas.