A new crab season beings and this time its the Opilio Crab season. As the crews and the ships return to Dutch Harbor in January, they prep their ships in hopes that this new season will better than the last one

The Arctic ice pack descends on the fleet as they make their final runs. Both the crews of the Northwestern and Wizard battle freezing spray. The Cornelia Marie's crew suffers from "Bering Sea dementia" while the Time Bandit's crew is at its breaking point.

Ice bashing takes its toll on the fleet; an exhausted crew tries to keep up with the skipper's maniacal pace on the Northwestern.

Two brothers find themselves in the same dire situation that sunk their father's boat. After a midseason hiatus, the fleet returns to the Bearing Sea, but the ice is back and worse than before. Now the skippers could get pushed past their breaking points.

The fleet's weathered the storm, but the crabs are still off the bite. Desperate to make their offload dates the captains mercilessly grind their crews. Not making any money, the deckhands start to get sick of being bullied.

With only three weeks left in Opilio season, the fleet prepares to make the final push to wrap up their seasons. Captains battle weather, equipment and their own men in a sprint to the finish, but nothing comes easy.

After enduring months of mechanical breakdowns, sleepless grinds and infighting, the fleet is starting to crack. And when deckhands on the Wizard are unable to lasso a floating walrus carcass, one man takes matters into his own hands.

The younger generation is put to the test as the fleet races to finish a grueling Opilio season. As defiance on the Wizard turns brother against brother, an accident brings one crabber's career to a gruesome end.

As the crab become harder to find, veterans Sig Hansen and "Harley" Davidson form an unusual alliance, however trust doesn't come easy for old school captains. Freddy pays a price for Keith's decision to haul in rough seas and Jake tempts fate to become a boat owner.

As smoke starts to fill the Wizard, Keith and Monte face a dark ship nightmare. Massive breakers shatter Jake's steel anchor forcing him to fight to avoid the rocks of St. Paul Island. Battered by relentless seas, Sig turns to his family to fill the Northwestern's tanks.

The bone-breaking winter unleashes fury on the Summer Bay. A rookie mistake leaves Captain Bill short a hand. Jake hits the jackpot at sea, but forces on land cost him dearly. There's hell to pay when Sean discovers the fatal flaw in his crab count.

Each captain’s next move determines who survives the final winter push. Winds put the Wizard on a collision course with a monster wave. Jake taps a Hillstrand to save the Saga. Josh and Casey hit numbers not seen since Josh’s father, Phil Harris, was captain of the Corneila Marie.

In the season finale, with just ten pots to go, a crushing injury requires Coast Guard rescue. Josh and Casey face a huge loss when their offload gets cancelled. Sig gambles on an early finish, while Monte hauls more crab than the Wizard can hold.

The Coast Guard responds to a mayday call as captains and crew brace for the loss of friends during a brutal winter storm. Sig and Monte track an opilio hoard at the Russian line, and the clock is ticking for Wild Bill & Junior during the cod derby.

As the crab biomass migrates across the Russian line, Josh and Casey dump 175 pots on the border. Sig and Mandy go dark ship in towering seas. Jake's new deckhand gets injured while Junior attempts to steam through False Pass in a nighttime blizzard.

Facing a 500-mile wide Siberian storm, Josh takes a big risk to keep the Cornelia Marie crew safe. Junior loses control of his rudders putting his boat at the mercy of heavy seas. Jake’s greenhorn problems get a lot worse when one clogs the toilet.

Listing heavily and taking on water, Junior calls on chase boat rescue for the first time in series history. Wild Bill sends Nick 20 feet off the deck in spite of his fear of heights. Josh and Casey hit a massive wave that knocks out greenhorn Maria.

On the Summer Bay there's hell to pay when Bill's backup block goes missing. Cornelia Marie skippers Josh and Casey navigate a tenuous partnership at the Russian line. Weighed down by three full tanks, Sig puts a heavy Northwestern in Mandy's hands.

The Wizard catches fire in a violent storm known as a bomb cyclone. Josh and Casey attempt to fish in 30-foot seas, while two rogue waves slam the Southern Wind. Wild Bill grinds his crew 72 straight hours bringing himself to the brink of collapse.

Battling exhaustion, Wild Bill and his crew face the full wrath of the bomb cyclone. A snapped tendon puts the Summer Bay down a man. Josh gambles on crab-rich grounds in a costly venture north. An injured Mac fights to get Junior through the storm.

As an injury knocks Sig out of his wheelhouse, Mandy takes the helm to face a disgruntled Northwestern crew.

Stuffed pots come at a price as Jake scrambles to repair a slack tank before it kills his crab or capsizes the Saga.

Josh and Casey race to haul pots as engine failure threatens their delivery window. As seawater destroys his hydraulic motors, Junior attempts a risky high seas delivery of three new motors. Harley and his crew bang heads over his fishing strategy.

Sig and Mandy conspire to get Jake to do their prospecting, but the former deckhand seizes the moment to fill his own tanks. The Wizard crew must break through ice to rush Keith to a doctor. Junior fears the worst as a deckhand falls from the stack.

As the fleet mounts a final Winter season push, sad news rattles the Cornelia Marie wheelhouse. Lady Alaska greenhorn, Gabby, overcomes a painful injury to support her crew. Wild Bill's deckhands must devise a bush fix or face hauling pots by hand.