Every day around the UK, an army of unpaid volunteers put their lives on the line to try and save complete strangers. Saving Lives at Sea tells the story of the ordinary men and women of the Royal National Lifeboat Institution (RNLI) who, across the country, are ready to launch their boats and race to the rescue within minutes of a cry for help - 24 hours a day, 365 days a year, whatever the weather. Using footage shot on crews' own cameras, this series takes us right into the heart of the action, capturing the unpredictable work of the RNLI in never-before-seen detail.

In the first episode, a father and daughter find themselves treading water for almost an hour, hundreds of metres out at sea, after being swept out by a rip current. In Kinsale, Ireland, three fishermen swim for their lives as their trawler is smashed on to rocks. And in London, an unlucky tourist is minutes from hypothermia after his attempt to take a selfie lands him in the Thames. Show less