Deadliest Catch: Bloodline

The discovery of mysterious fishing charts on the Cornelia Maria leads co-captains Josh Harris and Casey McManus to Hawaii to learn what Josh's late father, Captain Phil Harris, was attempting to accomplish decades ago.

Josh, Casey and Jeff travel to the southern edge of Kona's fishing grounds -- a spot Phil Harris frequently explored. Despite the rough waters and unpredictable weather, the trio dives into Kona's shark-infested waters to learn what kept Phil 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.

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.