The Campbells S04 E18 Ancient Wounds*

A resentful woman from Sims' past claims to be his jilted fiance. Harriet throws Sims out of the house at precisely the time Rebecca is due for evaluation as a teacher. With Sims out of the house, James agrees to pretend to be Sims for the night and has to endure anti-Scot bigotry. When Harriet is later injured and the stranger shows medical proficiency, James discovers that the woman is lying about her relationship with Sims.