This is the film version of Oscar Wilde's classic tale about a man whose physical appearance remains the same despite his depravity.
Finally, Wilde's tale is adapted faithfully. In this film version, Dorian is not a magical superhero/villain a la The League of Extraordinary Gentlemen or a horribly corrupt murderer a la Dorian Gray. He is instead appropriately narcissistic and tortured. Within Hurd Hatfield's performance is a healthy conscience that manifests in his eyes but not the rest of his physiognomy. The real improvement comes in the performance of George Sanders who captures Wilde's Lord Henry perfectly. Dorian Gray with Colin Firth posited that depravity was the logical extension of Lord Henry's philosophy, but Sanders's performance correctly captures what Wilde might have said: that fun is the logic extension of Lord Henry's philosophy. There's a big jump between a philosophy that deifies the aesthetic and a philosophy that finds beauty in murder. This seems like an obvious point, but of the adaptations I've seen, only director Albert Lewin seems to understand it.
Overall, if you really hate reading but still want to see a version of Oscar Wilde's novel, then see this one.