Join Nick Clarke on an amazing journey along the River Thames as he hitches a ride on over 30 different river vessels and travels 215 miles against the flow, from the North Sea to the source in Gloucestershire. Thumbing a lift, he meets a myriad of local characters, discovers a rich variety of wildlife and unearths an amazing wealth of local history. This popular LWT series offers a fresh and unique insight into the people and character of one of the greatest rivers in the world.