The final programme examines coastal issues highlighted in earlier episodes: sea level rise and erosion; the health of our seas and wildlife, power generation; and access to our coast; as well as development.

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The beautiful cliffs of Dover are a breathtaking sight. On this stretch of the coastline chalk has not only defined and shaped the landscape but has also been the starting point of many innovators and their pioneering work. Our guide Neil Oliver takes over from Nicholas Crane this series, and guides us along this journey of beautiful scenery and remarkable discoveries.

Neil Oliver explores an inaccessible cave inlaid with beautiful stonework - who was the mystery builder? Nick shows us how to read the history of your local beach and Alice traces the story of a foreign boy washed up on the Welsh shore and how he changed the history of medicine.

Why did Alfred Nobel, founder of the famous prizes, pick the South West of Scotland as the ideal site for the world's biggest explosives factory? Nicholas Crane discovers the remarkable use for the island of Ailsa Craig's beautiful granite.

Neil Oliver discovers the network of cables under a Porthcurno beach which wrap around the world in a tale of invention, espionage and surprise. Mark Horton visits the Isles of Scilly to meet the two football teams battling it out in Britain's smallest league and Alice Roberts paints up a storm in St Ives.

Discover why Dublin is the greatest coastal city, join Mark Horton as he goes in search of the wreck of the SS Great Britain and Miranda Krestovnikoff spends a day at the races. Alice Roberts visits a remarkable house designed to see the sea from every room.

The concrete and steel of the North East coast conceal a remarkable history of religious passion that transformed Britain and touched every corner of the world. Neil Oliver explores this ancient coastal landscape and also reveals its contribution to the abolition of the slave trade.

At the outermost edge of the British Isles, we discover the struggle to survive in this harsh but stunningly beautiful myriad of islands big and small. Crystal clear water and powder white beaches conceal a history of human tragedy and joy.

Alice Roberts savours the sea salt at Maldon, Miranda Krestovnikoff goes trawling on the Thames and we discover how the houses of Parliament can claim to be on the coast. We end the series with a remarkable cricket match miles out to sea on the eerie tidal landscape at Goodwin Sands.

Over 230 islands make up the Northern Isles - The Shetland and Orkney. These magnificent islands are made up of rock stacks, secret inlets and spectacular scenery, surrounded by sometimes extreme sea and weather conditions that have shaped these islands. Neil Oliver joins an expedition climbing the Old Man of Hoy in Orkney and finds out about the Second World War freedom fighters who risked their lives running the "Shetland Bus". Miranda Krestovnikoff goes in search of an elusive octopus, Nicholas Crane finds evidence of a tsunami that devastated Britain 7,000 years ago and Alice Roberts unearths a mysterious skeleton that reveals more about the lives of ancient Shetlanders.

Neil explores why Sandbanks in Poole Harbour has some of the world's most expensive houses. Alice builds her own coastal 'property' as she investigates the perfect sandcastle. Dick joins an American serviceman on an emotional journey, as he returns to the beach where he was given up for dead during World War Two.

Miranda is in search of the biggest sharks in British waters. Mark sees the Royal Navy's next generation of top secret 'Attack' nuclear submarines and Alice meets a woman who as a child was in the Isle of Man's internment camps, where 'enemy aliens' in Britain were held during the Second World War.

Neil discovers how a beach became the 'fastest place on earth' 80 years ago. Mark explores how Swansea's monopoly of the copper trade sped Nelson towards his Trafalgar victory. Miranda joins dolphins at the coast raising their young and Alice boards a dredger to discover how much sand we are consuming.

Miranda dives into a marine reserve off St Abbs, one of Britain's sites for underwater wildlife. Neil recreates a wartime scheme to train seagulls to search for German U-boats and Hermione explores the 400-year-old connection between a picturesque village and the birth of deep coal mining in Britain.

Neil discovers how mysterious flotsam inspired Columbus' journey to America. Alice explores the botanical puzzle of "The Burren" - where Arctic plants grow next to Mediterranean flowers. Miranda reveals the surprising secrets of seaweed that make it the special ingredient in everything from toothpaste to beer.

Neil explores the site of an experimental Radar, built to spy on the Soviet Union. Alice tries to capture the beauty of Southwold in paint. Nicholas discovers how tides and weather can cause catastrophic floods and Hermione meets a woman who intercepted German radio messages from the Norfolk coast during World War 2.

Neil investigates the tragic story of the first channel swimmer. Alice explores Jersey's remarkable post war transformation from Nazi stronghold to 'Honeymoon Island'. Miranda enters secret caves and Mark reveals why the islanders on Guernsey remain loyal to the Queen, despite being outside the United Kingdom.

In this first episode the team embark on an extraordinary circular tour of the Irish Sea to visit every country and territory within the United Kingdom. The hub for this wheel around the heart of the British Isles is the Isle of Man where Neil Oliver explores the small island. On the edge of the Irish Sea at Morecambe Bay, Alice Roberts gets trapped in quicksand to discover why it is so sticky and so deadly. In Northern Ireland, Miranda Krestovnikoff sees how seals cope with the struggle to find food as they bring up pups in the beautiful inland sea of Strangford Lough. Nick Crane goes sea cliff climbing on the remarkable rocks of Anglesey as he explores why this corner of North Wales is the site of some of Britain's biggest earthquakes.

Neil Oliver performs the lead role in an extract from Shakespeare’s "The Tempest" on the stage of a remarkable coastal amphitheatre near Land's End. Nick Crane ventures out into the infamous "Portland Tidal Race" to see how this fearsome tidal surge creates some of the roughest waters in Britain, surprisingly close to the tourist beaches and Georgian splendour of Weymouth. Miranda Krestovnikoff goes in search of a family of White-Beaked Dolphins and Alice Roberts follows her nose to discover what gives the sea its distinctive smell. In Devonport, Mark Horton has privileged access to the historic dockyards to see where the wooden ships of Nelson’s Navy were built. Mark reveals how the steel fleet of the modern Royal Navy still relies on the age old skills of wood working.

Neil Oliver explores the province of Finistère, "The End of the Earth", and meets a lighthouse keeper made famous by one of the world's most reproduced photographs. Nick Crane joins the "Onion Johnnies", who gave us our stereotypical image of a Frenchman, complete with stripy tee shirt, beret and bicycle laden with onions. Alice Roberts reveals the life saving chemical element that's locked away inside seaweed and Miranda Krestovnikoff dives for a seafood delicacy. At Carnac, Mark Horton wanders amongst the mysterious lines of standing stones, erected thousands of years before Stonehenge, to investigate their age old connection with Britain.

Neil Oliver takes part in an aerial dogfight to discover why a Nazi flying ace landed his top secret new plane on Welsh tarmac at the height of the Second World War. Miranda Krestovnikoff visits a seabird paradise, the magical island of Skomer, and at Porth Oer, Alice Roberts attempts to solve the riddle of the "Singing Sands". What makes some very special British beaches whistle when you walk on them? Mark Horton visits and imposing castle at Harlech, one of the best preserved in Britain. Nick Crane explores the violent history of smuggling around the gorgeous Gower Peninsula and abseils into an extraordinary stone structure concealed in the side of a sea cliff.

Just five months before President John F. Kennedy was assassinated in Dallas, he was riding in an open top limo through the crowded streets of Galway. Neil Oliver meets the photographer who managed to get up close and personal with the President and talk him into the perfect snap. Miranda Krestovnikoff explores an odd little island where the mountain hare population is thriving and Nick Crane investigates a local legend that says that Clew Bay has 365 islands, one for each day of the year. Alice Roberts unearths the remarkable remains of the oldest farm in the British Isles.

Neil Oliver joins the crew of the last surviving coal fired, steam-powered, "Clyde Puffer". Amateur artist Alice Roberts explores what drew Joan Eardley to Catterline and how her life was cut tragically short on the verge of great success. Nick Crane reveals how the majestic Loch Ness became part of Britain's biggest building project in the early 1900s. Miranda Krestovnikoff dives into Loch Creran to explore how the tiny worms built a giant reef known as Worm City. Hermione Cockburn visits the "Islands that Roofed the World" and Mark Horton unearths what remains of the mysterious and violent people who once ruled much of Scotland, the Picts.

The Danes top the polls as the happiest people on earth and Neil Oliver wants to know what they have to smile about. Nick Crane investigates how the Danish made a big business out of selling bacon to Britain. Alice Roberts sets sail in a full scale replica of a Viking longship to see how these ships gave Norsemen the advantage over the English in battle. Miranda Krestovnikoff meets some unflappable red deer. On Heligoland, Mark Horton reveals how in 1947 Britain's Royal Navy blew this tiny island apart in the largest non-nuclear explosion the world had ever seen and Dick Strawbridge gets access to the construction of one of the world's largest offshore wind farms.