Louisa invites Martin to the Portwenn Players Dance; Martin makes a house call to a park ranger who claims to have a six-foot red squirrel as a friend.
Louisa's ex returns to Portwenn hoping for a reunion; Martin sees a patient who has a history of self-injury; Elaine's cousin, Pauline, takes a job at the surgery.
Martin urges Mrs. Tishell to remove the collar she's worn for years; career disagreements lead Louisa to break up with Danny; a man from the Salvation Army arrives in Portwenn.
Unhappy with his lot in life, Bert Large abandons his plumbing business to start his own restaurant, but the eatery's opening is followed immediately by several cases of food poisoning.
Martin is unsure what to do when he hears Louisa's news, but Louisa does not want him involved; Louisa's new headmaster is exhibiting erratic behavior.
Martin urges Louisa to slow down after he catches her moving furniture; Martin refuses a handicapped parking tag for an elderly couple when the man won't prove he is disabled.