I'm giving it 5 stars for probability. Sure the acting wasn't all that great and the ending was poorly written but what are the odds of this portrayal actually happening in the real world? I'm sure Jack the Ripper is going on about why he didn't think of this first. If this movie were to be redone with today's tech I believe Mary would be invited to become an Agent of Shield or something. None the less this movie made me want to go out become a surgeon just for for the quick cash. I wonder what effect it has had on more involved med students? Every major city has an underground. What underground wouldn't be complete without it's own Mary Mason.