Hugh Dennis and the expert archaeologists revisit some of their most exciting archaeological adventures - from incredible Roman revelations to the unveiling of Viking faces from the past. Armed with trusty trowels and spades of enthusiasm, Hugh and the team have been digging in back gardens across the country for the past few years, all in a quest to uncover new chapters of history. With help from local communities, they reveal the secrets beneath the nation's feet.

Hugh Dennis and the team visit the village of Strelley in Nottinghamshire, on a quest to find the long-lost medieval castle of a knight from the 14th century. Sampson de Strelley came from a long line of knights and rose to become the Sheriff of Nottinghamshire, but the castle he built has vanished from the landscape.

In Northumberland, Hugh Dennis and the team excavate the birthplace of one of the country's most famous naturalists and engravers, Thomas Bewick.

Hugh Dennis and the team visit Studley Royal Park in North Yorkshire, on a quest to find the lost Georgian mansion that would have been at the heart of the world class Water Gardens, which still exist today. The house and gardens were created by John Aislabie, but his house has vanished from the landscape and the only clue the team has to go on is a fallen tree that's revealed some mysterious bricks. With the help of the local community, the team uncovers the foundations of this Georgian mansion and finds out about the grand lives of the family who once lived there.

Hugh Dennis heads a team excavating back gardens around Britain. Joined by archaeological scientist and lecturer at Newcastle University Dr Chloe Duckworth, field archaeologist Natasha Bilson, and author and archaeologist John Henry Phillips, he reveals a new chapter of Roman history in Cornwall, at a recently discovered Roman fort near Calstock. Little was previously known about the Romans in this part of England, but the indications from the team's excavation are that the Romans were not in the south west solely for a military campaign. Hugh also visits the reconstructed Lunt Roman Fort in Coventry.