20 Oct 2008 20:30 BBC Two

In the last programme of the definitive guide to the very best seasonal food, Valentine celebrates the finest British fish and seafood.

Valentine battles the tide when he travels to Holy Island off the coast of Northumberland for the plumpest mussels to make his delicious take on a Cornish pasty – a mussel empanada. He sets sail from Cornwall in search of the ultimate autumn treat of delicious deep fried oysters, and he tries to get a group of lifeguards hooked on his all time favourite fish with a quick and simple supper of mackerel on toast. If you eat food that’s in season you get the best flavour and the best bargains. Why eat anything else?