SPOILER inside: Just watched this movie for the first time
It's a long time ago. Sixty years in fact. But if you've never seen this movie before, I have a spoiler....haha...
.....I was shocked Nan was killed so soon into the movie. I had her down as someone who would last till the end. I was also shocked she saw her teacher's face (Christopher Lee) just as the knife was plunged into her. So she knew he had trapped her.
The movie lost pace after that, I thought. It had a disappointing ending. Also, most of the actors only made one or two movies after this one. I can't see the leading man (the hero) was very good at acting. The only true star was Lee.