Join Rae Borras as he takes a source to sea  journey down one of Britain's most famous rivers, the mighty River Thames. Starting at the source near Cirencester, Rae travels downstream and meets many people working and fishing on the river, explores the river's great history in trade and leisure pursuits, and examines its current environmental state. He of course samples the myriad of fishing opportunities the river can still offer anglers from fly fishing in the upper Thames, to fishing from a punt in Oxford and fishing for large Roach in the centre of London with old pal Keith Arthur. Rae also experiences some urban fly fishing on the River Wandle with Damon Valentine, before ending up with sea fishing expert,  Dave Barham in the Thames estuary.