Nick retraces the steps of smugglers in Robin Hoods Bay; Neil goes to the first Butlins Holiday camp in Skegness; whilst Mark sets sail in a recreated bronze age boat; and Alice recreates alum crystals using stale urine!

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 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.

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.

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.

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.

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.

Dr Alice Roberts investigates how greed led to a village being washed into the sea; Nick unearths the history of slavery in Plymouth; while Neil and Mark try to wreck a ship with nothing but a candle; and Miranda comes face to face with a shark!

Alice discovers 5,000 year old footprints on the beach; whilst Nick investigates our worst lifeboat disaster; Mark is on the track of the Roman conquest of Northern Europe in Maryport and Neil ventures onto the treacherous sands of Morecambe Bay.

Nick explores the holy island of Lindisfarne; Alice helps rebuild Britain's first house in Howick; whilst Neil examines the tensions in South Shields that led to race riots in the 1930s and Miranda gets up close and personal with grey seals.

Nick investigates the freak floods of 1953; Alice explores the landbridge which joined us to the continent; whilst Nick meets Peter Boggis, a man trying to save his home from the sea; and Neil celebrates Trafalgar 200 examining an eye witness account of the battle.

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.

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.

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.

The south coast of England was the home of movies long before a frame was shot in Hollywood, thanks to long hours of daylight and glamorous London actors holidaying by the sea. Neil Oliver tries his hand at directing his own silent movie. Alice Roberts re-lives the glamour days of the hovercraft and on the Isle of Wight, we go in search of dinosaur footprints which prove the island has been on an epic voyage heading north from tropical climes 135 million years ago.

Castles are an integral part of the history and landscape of Britain, but the art of building a castle was brought across the channel by William the Conqueror. We visit the medieval quarry in France which supplied the stone for iconic buildings such as the Tower of London and Canterbury Cathedral. Nick Crane sets sail from Dover to visit the white cliffs of France. Connected by land before a mega flood carved the channel, Nick discovers that these divided cliffs are facing parallel challenges of coastal erosion.

The team's journey continues around the stunning shores of Devon and Cornwall. Nick Crane is on a fishing expedition on board one of the last remaining Brixham trawlers. He also explores how Henry VIII, fearing attack after his famous divorce, built a string of cleverly positioned forts all along the south coast. The Isles of Scilly are surrounded by lush, golden green underwater meadows of seagrass; Miranda Krestovnikoff explores the diverse wildlife of this natural sub-sea paradise. Mark Horton reveals the extraordinary story of how Lawrence of Arabia went to Plymouth, where he helped develop revolutionary fast rescue boats that saved countless lives in the Second World War. Dick Strawbridge learns the surprising secrets of the global steam power revolution pioneered in the tin mines of Cornwall some 200 years ago. And with the aid of some big wind machines, Alice Roberts creates her own perfect storm.

The team returns to visit more locations around the nation's shoreline, beginning by exploring a diverse range of invasions. Nick Crane heads to the Channel Islands to learn about the German occupation of Guernsey during the Second World War, while Tessa Dunlop visits Norfolk to hear stories of a little-known Zeppelin bombing campaign on Britain during the Great War. Ruth Goodman goes to the Isle of Man to find out how it became the home of the TT motorcycle race, which attracts around 10,000 bikers from around the world each year, and Andy Torbet encounters a colony of water voles on a rocky outcrop in the seas off western Scotland.

South Wales has the second highest tidal range in the world. It is the tidal surge that creates the Severn Bore: Nick follows the wave upstream; whilst Neil explores the history of Cardiff coal; and Alice gets acquainted with the Red Lady of Paviland.

Neil discovers the story of a Welsh Atlantis lost beneath the waves; Miranda goes in search of leatherback turtles; whilst Alice descends into the caves of Great Orme and Nick canoes in the treacherous Menai Straits, to examine the bridges across to Anglesey.

Neil joins the crew of the trident submarine HMS Vanguard; Miranda goes hunting for Minke whales; whilst Mark and Neil recreate the inter island rocket mail service; and Nick sails the beautiful Western Isles armed only with a 500 year guide book.

Miranda heads to the Moray Firth, home to bottle nosed dolphins; Nick investigates the impact of the North Sea oil industry; whilst Neil meets a fishing family in Fraserburgh, facing a bleak future; and Alice reflects on the history of whaling in Dundee.

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.

3,500 years ago, an international demand for Cornish tin put Cornwall at the centre of an internation arms trade. Mixed with copper, Cornish tin made high quality weapons, giving birth to the British Bronze Age. Hermione Cockburn discovers what happened when American media mogul and inspiration for Citizen Kane William Randolph Hearst, made a run-down castle with a sea view into a little hideaway for him and his mistress on the Welsh coast. Neil Oliver visits Porthcawl to trace the history of the Welsh Great Escape.