I assume that most of us have read (or seen the movie version) "The Strange Case of Dr. Jekyll and Mr. Hyde", as first written by Robert Louis Stevenson. But just in case you haven't, let me give you a quick - and hopefully non-spoiling - synopsis: Dr. Jekyll, a somewhat mild-mannered doctor (described as a kind, sociable, amiable, reputable gentleman) feels that there is always a battle going on between the good and evil within himself. He'd spent a good part of his life trying to repress, as he believes, the evil urges within him. Failing to do so, he instead develops a serum (potion) to separate himself from the 'evil' side that is within him ...