You see, none of these versions is true to the way Stevenson wrote the story. He made the identity of Mr. Hyde a mystery in a surprise ending. But of course, we all know who Mr. Hyde is, so when you read the book there's no surprise and it's very anti-climatic. But I've begun to notice that this idea of a double identity is very common in literature, especially from the Victorian era. A recent book I reviewed talks about Joseph Conrad's Lord Jim and how we may think of ourselves in one way but behave differently under pressure. (The author compared Jim's actions to J. Bruce Ismay, the owner of the Titanic who jumped from the sinking ship just as Jim had done, and discussed "the self we believe ourselves to be and the self-unknown.") It takes on a much darker shade in The Portrait of Dorian Gray, about the handsome young man whose portrait ages and shows the ravages of a debauched lifestyle, leaving his own face youthful and untouched.
One aspect of Jekyll & Hyde that I found interesting, however, was Jekyll's reason for doing what he did. He felt guilty over his sins and shortcomings, and wished he could separate his sinful side from himself (or that self he believed himself to be), thereby freeing himself from the anguish and guilt of his weakness. Unfortunately, it didn't work out like that. Instead, Hyde was unleashed and part of Jekyll enjoyed the indulgence of Hyde's immoral activities. And the more Jekyll allowed Hyde to run free the harder it became to control him, until Hyde was becoming the controlling force within him. Of course, this was a common caution preached from pulpits everywhere upon the release of the book, but it's not a part of the story we ever see or have even come to associate with it. (Not in the Tweety Bird version, either.)
At any rate, it's a short and easy read and the concept of inner conflict is an interesting aspect of the story (and it's the only book I could come up with that is somewhat Halloween-ish). I recently listened to the audio version and it's more enjoyable when you understand how the story is written and aren't expecting a surprise when there isn't one.