Professor Alice Roberts explores the year's most exciting archaeological finds in the north of Britain. A team discovers clues to Scotland's first kingdoms, metal detectorists unearth a hoard of Viking treasure, and a new housing development reveals a graveyard of Iron Age warriors.

Professor Alice Roberts explores the year's most exciting archaeological finds in the east of Britain. A team unearths a mass grave, divers search the Thames for clues to a 17th-century tragedy, and a metal detectorist makes the find of a lifetime.

We discover the camp from which Vikings invaded Britain, and find groundbreaking new evidence that the world-famous Avebury stone circle isn't just a sacred site but a place where our ancestors lived and worked - a discovery that's also changing our understanding of neighbouring Stonehenge. In Staffordshire, the oldest Iron Age gold in Britain is unearthed - a set of beautiful gold torcs, mysteriously abandoned 2,500 years ago.

In this special, Professor Alice Roberts reveals the forgotten story of the Roman Army's secret weapon in Britain - their cavalry. These fearsome horsemen were the key to defending Britain's most famous Roman monument fortification, Hadrian's Wall. Alice sets off across Hadrian's Wall to investigate any evidence the Roman cavalry left behind, while a team of archaeologists and historical re-enactors attempt to re-stage a Roman cavalry tournament - a spectacle that no one has seen for over 1,600 years. We follow the team's training as they prepare for the performance, and Alice joins them at a public display in Carlisle where 30 riders perform in front of a crowd of spectators. To put the cavalry's story in context, the film also explores the latest archaeological digs happening across the UK, each of which is searching for new evidence of the Roman cavalry. On her journey across Hadrian's Wall, Alice visits some of the most iconic sites associated with the Roman cavalry, including Chester's Roman fort, Vindolanda fort and museum and Hexham Abbey. Along the way she builds a picture of the horsemen's lives here on the northern frontier of the Roman Empire.

This episode heads to the west of Britain, while archaeologists join us back in the Salisbury Museum to look at the new finds and what they mean.

We unearth the biggest collection of Roman writing tablets in Britain, giving insight into what Roman London was really like. Off the coast of Kent, we dive into the English Channel to complete the biggest marine excavation since the Mary Rose - an 18th-century East India Company ship, packed with silver. Also in Kent, we're on the detective trail to find the very first evidence of Julius Caesar's invasion of Britain - an ancient fort scattered with human skulls and weapons.

Alice discovers the well-preserved writing tablets, swords and domestic items left by Romans at Vindolanda during a time of British rebellion. On the Scottish island of Iona, there are traces of a long-lost monastery and pilgrimage site that was originally built by the legendary saint Columba, and has been compared to Jerusalem. In the east of Scotland, a weapons hoard belonging to a wealthy Bronze Age warrior is unearthed.

Archaeological discoveries with Professor Alice Roberts. In the Cotswolds, a secret location, which appears to be a high-status Anglo Saxon cemetery, gives up a very precious and fragile artefact.

Alice Roberts reveals a Dutch ship sunk by the English, a Cornish Roman fort and a 5000-year-old Neolithic monument.

In Scotland and the north of England, Alice investigates an Ice Age camp, the mystery of a medieval skeleton and the earliest evidence of salt making in Britain.

A gatehouse riddled with Civil War bullets, a unique Iron Age shield made from bark and Roman burials with pots where the heads should be.

In central England, an RAF airbase with a Roman past, a forgotten medieval nunnery, a gold pendant from a 7th-century grave and a pub with a very long history of hospitality.

In the west of Britain, there's a rare medieval cemetery, a disappearing Mesolithic landscape, a mysterious Iron Age burial and the ruins of a Gothic masterpiece.

Digs in the West of Britain reveal a forgotten fortress teetering on the edge of a cliff, evidence of the oldest house in Cardiff and a discovery at a Roman mosaic that shocks the experts.

More than is expected is found in the remains of a house thought to be the childhood home of Lady Jane Grey. Plus the graveyard of a Victorian workhouse sheds new light on the Great Famine of 1845.

Digs in northern Britain reveal a Roman emperor’s lost bathhouse, the sunken treasures of medieval pilgrims and a formidable fortress perched on top of a Scottish mountain.

The team are on an archaeological hunt of our more recent past as they follow the search for artefacts from World War II.

Digs in southern England reveal a previously unknown Roman town, a Tudor ship buried beneath a quarry and evidence of Henry VIII’s financial under the Tower of London.

Travelling east, Alice discovers a Roman barn conversion, unearths a Tudor fort and finds intricately carved 10,000-year-old weapons.

Roberts reveals the most fascinating archaeological finds this year in the East of England: a Roman dodecahedron, the secrets of Boudicca’s hill fort and Waterloo’s disappearing dead.

Archaeology in the south of England unearths Britain’s oldest shoe, the lost shipyard of one of England’s greatest warrior kings and Britain’s top-secret WWII defences.

How a lobster led archaeologists to the discovery of an 8000-year-old neolithic settlement. And Naoise Mac Sweeney visits a construction site as it gives up the secrets of its Elizabethan past.

In the west of the UK, a spectacular monument older than Stonehenge, a 200-year-old mine trapped in time and a lost medieval friary.

Roman finds include the mystery of 97 babies murdered by the Thames, a fabulous Roman coin hoard found in Somerset and a man buried on a layer of dead animals.

Her journey takes her from Orkney to Devon by land, sea and air. In Norfolk, flint tools unearthed this year push the earliest human occupation back by 200,000 years, to around one million years ago. In Orkney an early farm yields glimpses of our ancestors' earliest religious beliefs and customs - cattle skulls buried within building walls, and tiny household goddesses. In Devon, we find one of the oldest known shipwrecks. And a bronze age burial holds a mystery, and touching evidence of grief echoing down over 2000 years.