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.

When an early morning dog walker spots a flare off shore, the Rhyl crew race to one of the most mysterious shouts they have seen. The Lowestoft crew find themselves paged to help to a sailor who doesn't want to be rescued. And at Tower, a good samaritan is clinging on for his life after trying to rescue a dog which has jumped into the Thames. Show less