The effective (if dated), very faithful rendering of Dickens' impactful work on social class. The caustic stereotypes in Guiness's* portrayal of Fagin got this film banned many places when it first came out in 1948.
*Yes! Same guy who plays Obi Wan Kanobi and Charles I, even younger!
*Yes! Same guy who plays Obi Wan Kanobi and Charles I, even younger!