Miranda Krestovnikoff joins the dolphins who come to the Welsh coast to raise their young.
BBC Two Wales only
11/23 Alice Roberts visits a plant that supplies a fifth of Britain's gas requirements. (R)
19/23 In Waterford, Alice Roberts learns how to make glass from sand. (R)
Nicholas Crane explores the beautiful coastal area of Sefton Sands.
Uncovering coastal stories that have helped shape the island nation Britain is today. (R)
3/8 Britain's bonds with its Celtic cousins across the Channel in Brittany are explored. (R)
14/31 Alice Roberts discovers how Danish Jews escaped the Nazis in a flotilla of fishing boats. (R)
BBC Two Scotland only
3/8 Neil Oliver travels from Southport to Whitehaven and makes a visit to the Isle of Man. (R)
BBC Two except Scotland
1/8 A circular tour of the Irish Sea visiting every country of the British Isles. (R)
BBC Two except Wales
Mark looks at how Swansea's monopoly of the copper trade propelled Nelson towards victory.
Neil Oliver visits the bustling port of Rosyth to explore Britain's global sea trade. (R)
2/31 Mark Horton discovers how 13th-century Harlech Castle would have looked when it was built. (R)
4/31 Neil Oliver performs on the stage of a remarkable coastal amphitheatre near Land's End. (R)
1/6 A journey around the edge of the British Isles and beyond. (R)
BBC Two except Scotland, Wales
9/31 A visit to the Atlantic shore of Ireland's northwest coast.