2011: Series Eighteen

The first stone henge to be discovered in Britain for a century would be cause enough for major celebration, but there's double bubbles as Tony Robinson and his hardy team of archaeologists celebrate their 200th dig, in the first episode of this new series.

The site is the bed of a Devon reservoir with a strange assortment of prehistoric remains. Luckily for the diggers the reservoir has been specially drained, but they still face three days of wading through thick, sticky mud as they piece together the story of thousands of years of rituals performed in this beautiful secret valley high up on Dartmoor.

The Team slowly uncover a network of monuments that suggest that they have found a major prehistoric site. But the best discovery is left until the last day when they unearth the remains of that stone henge. It's the perfect end to a milestone in the programme's history.

Tony Robinson and the archaeologists excavate a site in Leicestershire which they believe contains an Anglo-Saxon burial ground. Though their initial search for a cemetery proves fruitless, more digging leads to the experts uncovering evidence of several types of funeral, as well as a highly valuable piece of jewellery - and one member of the team volunteers to take part in a re-creation of a cremation ceremony from the period.

The experts are given an opportunity to dig at an army firing range in High Ham, Somerset, as they investigate a set of mosaics first discovered 150 years ago. Initial searches suggest the remains of Roman villas could be located on the site, and the team begins to build up a picture of the highs and lows of life in Roman society - until the weather threatens to bring the excavation to a premature halt.

Tony Robinson gets to choose a site for investigation for the first time in the programme's history - and decides to take the team to Jersey, home to a German anti-aircraft battery built during the Second World War. As the experts explore the area, they realise their site was part of a far larger and more complex settlement, and discover shocking facts about the islanders' suffering during wartime.

Tony Robinson and the team travel to Derwentcote in Durham, where they explore the Industrial Revolution's impact on the region by digging through the undergrowth to search for old furnaces and forges. Their search is also helped by the diary of an 18th-century industrial spy, and records from the time help shed light on how the area's cottage industries gave way to the power of expanding cities such as Sheffield.

Tony Robinson and the team embark on one of their most delicate missions to date, as they search for Roman artefacts beneath the graveyard of St Kyneburgha's Church in Castor, Cambridgeshire. With several reports of similar finds in and around the village, speculation mounts that they could find the remnants of a praetorium - a huge building that would have dominated the region's skyline during the period. However, as the experts start digging in other nearby locations, they discover that not all the evidence points to the same conclusion.

Tony Robinson and the team head to Groby Old Hall in Leicestershire - formerly the home of Elizabeth Woodville, wife of Edward IV - and discover a surprising array of archaeology beneath its gardens, including a medieval wall and possible evidence of a Norman castle. They are joined by author Philippa Gregory, who delves into the complex history of the Greys, the house's former owners and one of the most powerful dynasties in medieval Britain.

Tony Robinson and the experts travel across the Channel to Jersey, where they search for the origins of Mont Orgueil Castle, an imposing fortress constructed during the reign of King John. Their excavation is complicated by the fact that a newer castle was built on top of the old foundations in Tudor times - and the entire site is located on a rocky outcrop with sides so steep that they can only be scaled by mountaineers.

The team and experts head to Llancaiach Fawr manor, near Caerphilly, South Wales, to investigate an ancient moat. The team's geophysicists feel the site should provide them with the ideal conditions to determine what the ditch was originally designed to guard - but the project soon becomes one of the most baffling investigations in the programme's history.

Horse owners Stephen and Stephanie Fry believe an 11th-century flour mill once stood on their land, and ask Tony Robinson and the experts to search for evidence. Mick Aston soon finds ample clues that suggest their theory is correct, including the remnants of mill streams used to power grindstones - but a problem arises when one of their finds does not fit in with the story.

The team travel to Bedford Purlieus Wood in Cambridgeshire, where a set of Roman building foundations has been spotted poking through the forest floor. Aerial visualisations suggest the area was home to several structures - but the experts' attempts to find out more are hampered as the diggers struggle to get to grips with the cramped woodland environment.