'Wicked Tuna': Watch The Struggle for Season's First Big Catch (Exclusive Video)

The Wicked Tuna team is back for season four, and as usual it's not always smooth sailing.

In the clip above, the Pinwheel crew has quite a fish on their hands as they try to make the first big catch of the season. Meanwhile, there's plenty of action brewing on Hot Tuna as well.

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The show, which centers on Gloucester, Mass. fisherman, returns with its new season 9 p.m. Sunday on National Geographic Channel.