It's Portwenn Fun Day and the village is buzzing with excitement about this major fund raising event. PC Penhale is in his element rallying the runners and whipping up support.

It's Portwenn Fun Day and the village is buzzing with excitement about this major fund raising event. PC Penhale is in his element rallying the runners and whipping up support.

The event sparks culinary rivalry between Bert Large who runs Large's restaurant with son Al and Mark, the landlord of the Crab and Lobster pub. They are both keen to take advantage of the day to boost their takings by providing food for the runners and spectators.

The 'seafood soiree' and cut price drinks at the Crab and Lobster look set to win the culinary competition. Bert smells a rat. He suspects Mark is selling duty free booze, and calls in PC Penhale to investigate.

But the doc puts paid to Mark's enterprise when he diagnoses an infection which means he must not handle food, and bans him from going into the kitchen. Bert seizes the opportunity to take over the 'soiree'.

Louisa's mum Eleanor arrives in Portwenn unexpectedly. Louisa is far from happy about her arrival. She hasn't seen her mother for years, so why the sudden interest?

Martin is even less pleased to see Louisa's hippyish mother, who takes over his kitchen to cook up a herbal tonic. Eleanor takes great delight in her grandson, and offers to babysit.

Martin and Louisa are puzzled to find their previously wailing baby is sound asleep, and continues to sleep through his feed times. Eleanor confesses she gave him a drop of her herbal brew to soothe him. Martin points out that the concoction has alcohol content, which explains why the baby has been sleeping so much.

Louisa asks her mother to leave. But Eleanor manages to win her round, and she relents.