Tony Robinson tracks down the source of the River Thames as it emerges from the ground as a pure spring in a Gloucestershire field.
Tony Robinson follows the river as it winds its way through the beautiful Thames valley, stopping off at Henley-on-Thames, and then on towards the palace at Hampton Court, a distance of around 100 miles.
Tony Robinson's journey along the Thames reaches central London.
For the final part of his journey, Tony hits his home turf, the East End of London.
