"Deadliest Catch" is back for an explosive and action-packed fourth season that will have you on the edge of your seat from start to finish, as the brave fisherman wage war on the Bering Sea once more. Each year, hundreds of fishermen arrive at Dutch Harbour for the beginning of the Alaskan Red King crab and Opilio crab seasons. They work 24-hour shifts for days on end in brutal conditions, braving 12m waves, 130kmph winds and sub-zero temperatures, with 360kg crab pots slamming against the deck. Well-placed pots can mean a catch of King crab worth millions of dollars, while unlucky hauls will only just cover the boats operating expenses. Whatever the take one thing is for certain, the men and their families will feel the effects for the rest of the year. Follow the now legendary captains and crews of six crab-fishing vessels as we join Early Dawn, Cornelia Marie, Northwestern, Wizard, Time Bandit and North American for what promises to be the hardest hitting series yet!