Selina Cadell

When a nasty stomach bug sweeps through Portwenn, Martin takes to the radio to alert residents to the danger, with unforeseen consequences.

Martin comes face-to-face with Danny, an old flame of Louisa's who has returned to the village to visit his ageing mother, but the two fail to get along. Plus, is there a mugger in the village?

Doc Martin visits the Flint brothers at the remote country home they share with their mother and father. Wallace and Paddy have been suffering chronic stomach disorders, and a blood test confirms they have salmonella poisoning.

A local DJ has a suspected drinking problem. The Doc has trouble with an elderly patient, who smells so bad that no-one can bear to be in the same room with them.

Mark is forced to investigate his fiancée's past when a stranger arrives in the village with a mysterious photo.

Doc Martin treats an uncomfortable Louisa Glasson for suspected anaemia, and a reluctant Aunt Joan is forced to receive treatment from Martin.