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.