Paul and Bob take trusty terrier Ted to fish for perch on the River Thames. Comedian Richard Herring joins them for dinner, and discusses his recent battle with testicular cancer.

This limestone river flows through the Peak District, snaking its way through many "impressive gorges", said BBC Countryfile.

Paul and Bob head to the River Ouse in the heart of Bedfordshire to try to catch a big perch, which has so far eluded them over the course of several series. They discuss memorable teenage holidays ...