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Captains Joe and Tyler are in a heated battle in the season finale; fighting for the top spot, dark horse Niko spots a chance to steal the lead; with the biggest catches of the season yet to come, it all comes down to the final weigh-ins at the dock.

Harpoon Hunters

Fish to the Finish

With less than a quarter of the bluefin quota still available to catch, a change in weather forces captains to shift their strategy; Tyler quickly scores three big fish; Joe takes to the air, he spots a lone tuna, then races to find it at sea.

Fog of War

As the giant bluefin gorge themselves on schools of fatty baitfish, captains battle to capture oversized quota-killer tuna; young gun Joe scores a rare feat by landing three in a day; veteran Tyler struggles with both science and technology.

Late Season Monsters

With the advantage of spotter planes, veteran Tyler and young gun Joe battle for the most monster bluefin until Joe helps strongman Niko get back into contention; when Niko's zapper fails, Tyler steps in to save the day.

Keep Your Enemies Closer

As the bluefin fishery reaches its mid-season peak, three centuries-old fishing strategies compete for dominance; Joe banks on instinct, Tyler uses science to gain the upper hand, and strongman Niko relies on legacy -- but nobody relies solely on luck.

Boom Phase

As the fleet spots the first giants, Joe fights for his lead over Niko and Tyler; all bets are off as old-timer Bill joins the derby; Emmett struggles with the choice to fish without a plane; Dylan gets a $6,000 tuna.

They Might Be Giants

Captain Joe Dion takes his sons to sea, landing two bluefins and witnessing a great white shark feeding on a humpback whale.

Like Father, Like Son

Captains Joe and Tyler hit bluefin gold as second-generation harpooner, Niko Chaprales, fails to land even one.

Bluefin Bloodline

Expand your horizons with powerful and insightful news and information documentaries from the worlds of science, nature, medicine and outdoor adventure.

A group of four harpooners chase some of the highest-priced fish using only fast boats and aim; Niko must prove he can run a boat while Joe hunts to support his family as the fleet races to land the first bluefin worth thousands.

One Man, One Spear

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A crew of elite fishermen harpoon bluefin tuna off the shores of the Northeastern U.S.; the race for a hunt that could reel in a fortune.

S1 E2 | Bluefin Bloodline