Miranda Krestovnikoff joins the dolphins who come to the Welsh coast to raise their young.
BBC Two Wales
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.
1/10 Venturing to the furthest-flung reaches of our isles. (R)
3/8 Britain's bonds with its Celtic cousins across the Channel in Brittany are explored. (R)
Alice Roberts discovers how Danish Jews escaped the Nazis in a flotilla of fishing boats. (R)
BBC Two Scotland
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
A look at how Swansea's monopoly of the copper trade propelled Nelson towards victory.
8/8 Neil Oliver visits the bustling port of Rosyth to explore Britain's global sea trade. (R)
Mark Horton discovers how 13th-century Harlech Castle would have looked when it was built. (R)
Neil Oliver performs on the stage of a remarkable coastal amphitheatre near Land's End. (R)
On the Belgian coast, Miranda Krestovnikoff meets the men who use heavy horses to fish. (R)
BBC Two except Scotland, Wales
A visit to the Atlantic shore of Ireland's north west coast.