The amusing behind-the-scenes film suggests that catching large fish isn't always as easy as it might appear, though Bernard and Martin prove that the big ones don't always get away.
In another attempt to prove that there is no such thing as impossible, Bernard and Martin catch some large tench, perch and pike.
Searching Scotland for salmon leads Bernard and Martin to close encounters with red squirrels and plunging ospreys.
The winter season provides some of the best fishing of the year for Bernard, Martin and company. They ignore the cold and catch zander on a prawn, some pike on the fly, large barbel in a flood, "impossible" chub, grayling, perch and a truly monstrous roach from the River Stour.
Bernard and Martin take a glorious journey down the famous Hampshire Avon from source to sea, observing the underwater wildlife, including spawning trout and salmon in the headwaters and catching grayling and roach. Finally, they join friends to catch big carp, barbel, salmon and mullet.
Exploring our rivers and lakes through the seasons provides the angler with endless variety and excitement. After catching big bream and dace, Bernard and Martin are joined by Britain's most famous angler John Wilson who helps Bernard catch a carp on a fly, then catches his record-equalling pike from the Norfolk Broads.
"Catching the Impossible" is a celebration of Britain's underwater wildlife and the excitement of trying to find and catch our largest fish. In this series of nine one-hour films, famous actor and avid fisherman Bernard Cribbins joins record-breaking angler Martin Bowler in a journey of discovery and adventure.