Quacks - Season 1 Episode 3

William is treating Harold, who believes he is a French aristocrat pursued by vengeful revolutionaries so he stages a mock trial to disprove his delusion, though it does not go well. John, heavily in debt and unable to sell his tooth-brushes finds it pays to resort to peddling quack medicines whilst Caroline cross-dresses to gain entrance to the society of apothecaries, fooling Dr Combe, but also exposing her husband's attempts to seduce the wealthy Lady Campbell into being his patroness.