Every one of the RNLI's crew members brings their own unique skills to the station at which they volunteer. But they're all united by one key element: trust.In Humber, the crew must work closely together to pull off the dangerous medivac of a fisherman with a spinal injury. On the south west coast of Ireland, the Castletownbere crew race to the rescue of a fishing trawler that's run aground at nearby Dursey Island and is in danger of breaking up on the rocks.In the north Devon village of Clovelly, the crew launch in severe weather to assist a yacht that has lost all power. And the Ilfracombe lifeboat launches when cliff walkers spot a boat capsizing - and a man in the freezing water.