Everlasting Love

Martin rubs up against the new herbalist and Penhale, Louisa and James are all interested in Janice's new pedicure fish. Martin advises Mrs Irene Moore (Lesley Nicol) to stop cold-water swimming until they've ruled out the cause of her migraines.  Martin's ex-flame invites him to speak as keynote speaker at Imperial College, and Ruth is back from Mexico with more than maracas.