Pharmacist Sally Tishell remains enamored of Martin, fuelled by a cocktail of drugs that are affecting her judgement. Martin asks her to babysit James Henry for the day. Mrs Tishell mis-dispenses eyedrops to PC Penhale causing him to crash his Land Rover. Mrs Tishell mistakenly thinks that Martin has sent her a covert message through a young couple he has treated and vanishes on a bus with James Henry to a nearby holiday home. Martin, Louisa, Aunt Ruth and PC Penhale chase after her. To coax her out of the locked house Martin pretends to profess his love for Sally and a desire to stay in Portwen, while actually aiming his remarks at Louisa. James Henry is rescued, Martin and Louisa profess their love, kiss and reconcile.