Nick Crane reveals why the first lifeboat station was founded on the north-east coast at Bamburgh Castle,

Mark Horton finds out how ferries cope with stormy seas, and Miranda Krestovnikoff explores the jellyfish of Dublin Bay - and how both swimmers and scientists are seeking an antidote to its excruciating sting.

Dick Strawbridge investigates one of the strangest stories of the Second World War - did the Germans really invade the south coast in 1940?