Episode Four. Garrow, despite Sarah's assurances, in a deeply depressed mood having failed to save Thomas Whiley, a twelve-year old-mute boy, from the gallows, enters the civil court to hear Hill's accusation of adultery against him. Silvester, previously his adversary, defends him in the spirit of fair play and does well, demolishing the prosecution witnesses, Hill's Admiralty cronies. Meanwhile, Sarah's loyal maid Mary refuses to perjure herself and it is the dogged and devoted Southouse who saves the day by bringing in a surprise, last minute witness to expose Hill's hypocrisy.