Alice Roberts presents a roundup of fresh archaeological digs across eastern Britain, with footage shot on site by the archaeologists themselves rather than a separate crew. The centerpiece is the largest collection of Roman writing tablets ever found in Britain, offering direct written testimony of daily life in Roman London: debts, disputes, and names of ordinary residents. Off the coast of Kent, divers work the biggest marine excavation since the Mary Rose, an 18th-century East India Company ship that went down loaded with silver, and the film follows the recovery of cargo from the seabed. Elsewhere in Kent, archaeologists chase physical evidence for Julius Caesar's invasion of Britain, tracing it to a fort strewn with human skulls and weapons. The episode moves between these three digs, letting specialists explain what each find changes about the historical record, from trade networks to the mechanics of Rome's earliest contact with the island.