It's the beginning of week 10 of the North Atlantic bluefin tuna season in Gloucester, Massachusetts. With only six weeks of fishing left, the competition is heating up, driving captains to push themselves and their crews to the brink. On Kelly Ann, the future of Captain Paul Hebert's tuna season hangs in the balance, and on Pin Wheel, Captain Tyler McLaughlin's aggressive behavior may cost him his one remaining mate. The FV-Tuna.com crew fights to hold on to their No. 1 position on the leaderboard, and on Hard Merchandise, after hooking a shark, Captain Dave Marciano must dive under the boat to fix a problem. Meanwhile, beleaguered boat Drama is so far in the red that this week is their final chance to catch their first bluefin; otherwise, they'll have to call their season quits.

It's week 12 of the North Atlantic bluefin tuna season and, after catching no fish last week, last season's champion Captain Dave Carraro, of FV-Tuna.com, has sought help from his ally, Captain TJ Ott, of Hot Tuna. TJ directed Dave to the spot where he just caught three tuna and now Dave is desperate to capitalize on the information. TJ expects that, in return, Dave will alert him if the fish are still biting in his hot spot, but Dave hasn't earned the nickname "Tricky Dave" for nothing. Will Dave put fishing ahead of friendship and fracture ties with an important ally?