10/31 Neil Oliver visits an Atlantic sea monitoring station off the coast of Galway.
23/31 Neil Oliver immerses himself in Pembrokeshire's quarrying past.
An epic adventure around Britain, exploring 'The Riddle of the Tides'.
2/6 Mark Horton reveals how Brunel's ship the Great Eastern conquered the Atlantic.
30/31 Alice Roberts visits Bawdsey Manor, where Britain's first radar station was built.
1/6 The team investigates just what it means to be an island people.
31/31 A journey around the coast of Wales.
5/6 Nick Crane leads the team around Britain in a search of the secrets revealed by the tide.
4/31 Neil Oliver performs on the stage of a remarkable coastal amphitheatre near Land's End.
Nicholas Crane visits Bamburgh in Northumberland, whose castle sits on a basalt crag.