In Ilfracombe, a father and son find themselves in danger after jumping in to rescue a drowning dog. The Minehead crew must scour the cliffs and shoreline after a young woman goes missing in a distressed state. And when they're paged to a man seen entering the Thames, the Tower crew face the possibility they may not find him in time.

As the summer sun comes out, so do the fun seekers, and crews around the country get ready for action. In Southend, a family of five out sightseeing are a mile off shore and waist-deep in water after being caught out by the tide. The Shoreham crew are paged in the early hours after a drunken festival-goer jumps in the river. And the Brighton crew fear the worst when a man tombstones off the pier at low tide.