History of Horror on BBC Four

I must admit for someone who says that they love horror, I don't know much about the film genre pre 1950s or in fact Hollywood Horror.
Which is why I was glued to last night programing from BBC Four. It was nice to learn about the picture of the thirties and their main stars like Boris Korloff and Belugosi.

After the program they played the film the Bride of Frankinstein, when I think of this film, the image above appears in my mind. The funny thing is this character omly appears in the last 10 minutes, yet to people who have never seen this film she is one of the defining images of the picture.