Paul and Bob return to the river where they first went fishing together after Bob's heart surgery - the Test in Hampshire, fishing for brown trout and musing on the ephemeral nature of life.
Paul and Bob catch the sleeper train from Euston Station to the Scottish Highlands where they plan to fish for ferox trout on the River Garry. Bob can't resist the chance to look for Nessie in the vast waters of Loch Ness.
Paul, Bob and trusty terrier Ted travel to the Crogen Estate in north Wales to fish the River Dee for grayling. Along the way, they try to rediscover their lost youth on this trip, with mixed results.
In the final episode of the series, Paul and Bob put all mean feats behind them as they attempt to catch the most deadly fish in British waters- the Pike.
The two friends fish for salmon on the River Tweed in Scotland, beginning their trip at the isolated Bemersyde Estate before moving on to the Bridge Pool at Kelso. They stay in a Romany-style roulotte caravan.
Paul and Bob are back with a vengeance, this time fishing for the iconic barbel on the river Wye. The duo discuss their mortality with a vicar, and Bob tries to resist cakes at a local bakery.