For your Halloween viewing pleasure, here's John Barrymore as Dr. Henry Jekyll. No. Wait. I mean here's John Barrymore as Mr. Edeward Hyde. No. He's Dr. Jekyll...wait, he's Hyde. Er...Sweet mother of R. L. Stevenson, did I just give away a major plot point? Please ignore all of the above.
Ahem. Here's Nita Naldi in a flick from 1920.