Dickens exploits the hypocrisies and idiosyncrasies of the justice system in A Tale of Two Cities. As French citizens take to the streets, demanding justice for themselves and their families, they also construct a justice system that becomes anything but fair and impartial. To keep us from blaming the French too much, however, Dickens also gives us a good look at the justice system in England. Complete with magic mirrors and smoke-and-dagger tricks, the English can't brag about their courts, either. So how does justice get rendered? That is one of the questions this novel explores.
Dickens inserts two court cases (one French and one English) into A Tale of Two Cities in order to demonstrate the unsettling similarities between the two countries.
The English court, for all its failings, is still able to hand down good verdicts; by incorporating Darnay’s English court case into the novel, Dickens proves that the English justice system can never be corrupted in the ways that the French one will be.