After the discovery of mysterious fishing charts, Deadliest Catch captain Josh Harris turns to veteran fisherman Sig Hansen to learn more about the time his late father, legendary Bering Sea crabber Phil Harris, spent fishing in Hawaii decades ago.

Josh, Casey and Jeff travel to the southern edge of Kona's fishing grounds, where Phil Harris frequently explored. Despite the rough waters and unpredictable weather, the trio dives into the shark-inhabited waters to learn why Phil kept coming back.

Josh and his crew get an opportunity to supply ahi and mahi to a local restaurant and hope Phil's notes will lead them to a big payday. It's their first chance to turn a profit but if they want to succeed, they must first learn the Hawaiian way.

On Hawaii's Big Island, Josh enlists the help of Johnathan Hillstrand to help him dive deeper into the mystery of Phil's charts and gain insight into the time Phil spent in Kona Town.

Inspired by Phil's love of history, Josh, Casey and Johnathan Hillstrand brave unknown waters in the dead of night to try their hand at the ancient Hawaiian Ika-Shibi fishing technique.

With only two days left before they must head back to Dutch Harbor for King Crab season, Josh and Casey have one last goal to achieve in Hawaii -- land a big marlin, the one fish that eluded Phil Harris decades ago.

After following clues from his late father to the multi-million-dollar Kobe fishing ground in Hawaii, Captain Josh Harris’ business faces extinction.

Captain Josh gets a surprise visit from Jonathan Hillstrand. Challenges due to COVID-19 and a demanding client force the boys to get creative.

A large order from a new client in Vegas sends Captain Josh Harris and partners Casey and Jeff to the violent and Tuna rich waters off legendary Hilo Bay.

Jeff’s new fishing tactic leads the crew into shark-infested waters.

Johnathan battles a record Marlin, and Josh catches more than fish.

Josh sends Casey and Jeff on a difficult channel crossing.

An old friend of Phil inspires Josh to bring the Cornelia Marie to Hawaii.

Josh Harris gambles big on bringing the Cornelia Marie to Hawaii.

Josh, Casey and Jeff cast lines into Hawaii’s most productive offshore fishing spot. But strong ocean currents dash their hopes of a quick bounty.

Left mysterious Hawaiian fishing charts by his late father, Josh Harris and his business partner Casey McManus set out to uncover what his father was doing on the islands.

Captain Josh Harris reunites with his estranged older brother Shane, opening a new door in his quest for their father, Phil Harris.

In search of Ahi tuna, Josh's crew ventures to the remote islands north of Kauai; their greenstick snaps.

Facing two strikes with their Vegas buyers, Josh and Casey turn to Jeff for help from his secretive Hawaiian network; when a short order leads to strike three, the guys get fired by their biggest client, leading Josh to leave Hawaii for new grounds.

Josh and Shane pick up a trail left by their father that leads them to an unexpected location; in Hawaii, Casey and Jeff must face circling sharks to pull in fish.

With fresh clues from their father's past, Josh and his brother Shane head to Louisiana, where Wild Bill Wichrowski helps them follow a trail that leads to the man who built the Cornelia Marie and to rich new fishing grounds in the Gulf.

In the fishing hotspot of Venice, LA, a buyer demands an unfamiliar freshwater species; Josh and the team hook a prehistoric monster.

Josh and his brother Shane discover the most promising lead yet about what their father Phil was doing decades ago in the Gulf of Mexico. Casey and Jeff attempt to fill a challenging order by spearfishing in the murky water beneath the oil rigs.

Josh and Casey land a seafood order big enough to launch a second wing of their fishing business. But when Jeff gets an urgent call back to Hawaii, they must reach out for reinforcements gambling that Bering Sea veteran, Wild Bill, answers the call.

As Hurricane Ida slams the Gulf Coast, Josh, Casey and Shane are forced to abandon ship in a mass evacuation. With their fishing Mecca in ruins, they scramble to help survivors. Jeff closes a new deal in Kona and recruits fishing legend, John Hillstrand.

In the season 3 finale, after Hurricane Ida wrecks their Gulf Coast hotspot, Josh, Casey and Shane return to Hawaii where the dream began to complete their season. But even in paradise, mother nature has an even bigger disaster in store.