A tale of two guys

It was the best of tricks, it was the worst of tricks.
Sidney Carton could pass for Charles Darnay, and the others thought he was going to trade places with the doomed Frenchman.
Lucie would get her husband back, while Sidney would lose his head.
“Am I really going to do this?” he asked himself, facing the moment of truth.
“Hell no,” was his answer, but he said it in French with his impression of Darnay’s voice.
Then he had himself smuggled out of the prison as Darnay.
Lucie wasn’t fooled one bit. But she grew to love him anyway.