In the Season 20 premiere, King Crab's return ignites a derby-style race. After losing the Saga, Jake joins Sig as co-captain. A serious hip injury tests Sophia. A fire on the Wizard traps Keith's deckhand below deck. Wild Bill faces his hardest test yet.

As competition heats up on the King Crab grounds, Jake's next move puts him at odds with Capt. Sig. Wild Bill battles heavy seas and side effects, while Sophia "Bob" Nielsen attempts to pop in a deckhand's dislocated hip to avoid a steam back to town.

After leaving Sig's boat, Jake has a lot to prove on the massive Titan Explorer. Sig and Johnathan jockey to get ahead of a migrating king crab hoard in an underwater canyon. Rick faces Keith's wrath when his captain-in-training launches a rogue set.

A below-deck brawl puts Sophia "Bob" Nielsen's captaincy to the test on the Seabrooke. A hydro leak on the Summer Bay threatens to send Wild Bill's King Crab season into the red. Rick must make a crucial decision when Jacob's deckmate crosses the line.

When Sig's fishing information falls into the wrong hands, he deals his protégé a lesson he won't soon forget. After his crew gets slammed by back-to-back waves, Rick faces a gun-shy deckhand. Sophia contends with a crewman with a badly infected tooth.

On the Northwestern, Captain Sig contends with a man overboard for the first time in his career. Johnathan comes up short on crab but sees the tide turning when thousands of porpoises guide the Time Bandit in a new direction. Jack tangles with Wild Bill.

As the first Siberian storm slams the grounds, Sig sets into 40-knot winds, risking capsizing when his tank floods. Sophia must prove she can drive a boat and lead her crew in severe weather while Jake battles insubordination from his own new crew.

Sig deploys tactics from the old country to zero in on the Bairdi crab motherlode; Jack earns a windfall of new quota, but it comes at the cost of drug testing his crew; Jake gets burned by his own generosity.

Johnathan alters time in an attempt to get to port for an anniversary he promised Heather on land; Rick battles a Bering Sea gale that knocks his deckhand out of commission; Sophia helms the Seabrooke in the roughest weather she's ever seen.

Sig devises a clever way to simultaneously silence his crew and fish faster with the clock ticking on the fall season.

Mother Nature blows back as the four remaining captains battle to tank their fall quotas; Landon prays for deliverance on his first solo mission; Sig persists in fishing in 20-foot seas.

In the winter season premiere, Sig and Keith risk fishing far from land despite a forecast Super El Niño season and encounter a gauntlet of Bering Sea weather. After sand fleas consume his bait, Johnathan strategically sets pots near a submarine volcano.

As wintry weather pounds the fleet, a 30-foot wave crushes a Titan Explorer deckhand, threatening Jake's captaincy. On the Time Bandit, Johnathan loses a generator and goes dark. The Aleutian Lady drives into the weather to reach Dutch Harbor for repairs.

Aboard the Wizard, Keith must retrieve his lost anchor in 50-knot winds. Sig attempts a risky new strategy before finding himself racing to secure the next offload slot. Rick starts to turn his season around, only to lose a greenhorn to a gruesome injury.