It's time for the Portwenn Players Dance, an auspicious event in the village's social calendar, and Bert the plumber is in charge of selling tickets. Louisa buys two tickets and invites Martin. But Martin doesn't dance, and most certainly not at social occasions. At the office, Martin meets with a patient, Mark the constable, who confesses an embarrassing dilemma - he fears his lack of success with the ladies has something to do with size, and wants to hear the doctor's opinion of what is "normal." Later, Martin makes a house call to the park ranger, Stewart James. The two seem to have a lot in common until Stewart introduces Martin to his "friend" Anthony, who just happens to be a six-foot, red ... squirrel!