On the Sunrise, skipper John Stephen Sr is in poor health, which casts a shadow over the boat's future and leads to a daring rescue after he collapses suddenly. Viewers will remember the second boat, New Dawn, from last year. Life for the crew has been blighted by tragedy, though, since then: not long after filming of the last series was completed, Filipino deckhand Reynaldo Benitez, aged just 28, was lost at sea. It was a devastating blow to the crew who, a year on, are still struggling to come to terms with their loss. For the young skipper, Chaz Bruce, it means a fight to regain his dented confidence.

A team goes extreme crabbing off the Outer Hebrides in the worst weather seen in the programme's four-year history. The Arcane's father-and-son team Charlie and Charles McBride owe the Government hundreds of thousands of pounds for illegally landing fish beyond their quota - prison looms if they fail to catch the fish they need to pay off their debts.