Mysteries at Althorp's Roman Villa

As the exploration of the Roman Villa at Althorp continues, the archaeologists are learning more about those who once lived there.
The Roman artefacts that Adey has discovered; the underfloor heating that Dr. Siân Thomas has identified; the chunks of imported wine vessels that Dr Cat Jarman has catalogued - all are important clues as to how the Romans lived at Althorp, more than 1,600 years ago.
Meanwhile, Charles makes a discovery that helps Professor Mark Horton to understand why so much of this once massive villa is missing.