12 years on Time Team returns to the Roman Fort at Brancaster to tackle one of its biggest challenges yet: can you uncover an entire fort without digging? Armed with cutting-edge geophysics, John Gater, Jimmy Adcock and their teams survey the land, revealing vast hidden structures beneath the surface. From magnetometry to ground-penetrating radar, billions of data points begin to map out walls, roads and buildings lost for centuries. But as the digital picture emerges, a new question arises — how do you interpret a Roman fort you can’t yet see?