Final answer:
Charles Darnay is acquitted and released from his final trial in Paris, thanks to Sydney Carton's sacrifice, which is a key plot in Charles Dickens's 'A Tale of Two Cities' set during the French Revolution.
Step-by-step explanation:
The end result of Charles Darnay's final trial in Paris, as depicted in Charles Dickens's novel 'A Tale of Two Cities', was that he was acquitted and released, largely thanks to the heroic efforts of Sydney Carton. Carton, resembling Darnay, switched places with him, leading to Carton's execution in place of Darnay.
This self-sacrificial act enabled Darnay to reunite with his family and live a full life, escaped from the grip of the Reign of Terror. While not a direct historical account, the novel draws on the historical context of the French Revolution and illustrates themes of redemption and sacrifice.