Unseen Britain - Episode 3

Peter White goes in search of those who monitor how we spend our money, where we travel and the state of our health, while remaining unseen themselves. Peter meets forensic scientists and talks to them about their work. A 'questioned documents' specialist examines Peter's signature and reveals some of its secrets, and Peter also learns about some of the methods used to match crime scene marks with suspected shoes and tools. Plus Peter Dean, a police doctor and television consultant, discusses real crime compared to what we see on TV programmes.