Great movie from 1979. I will grant that my expectations were very low before watching The Killer Nun. This movie got everything what a movie should have, and I'm assured that anyone who see the full movie The Killer Nun will enjoy it. Anyway, this genre may boast of one of the larger number of titles. What determines the phenomenon of this movie? It's realism, taking care of psychological probability?. I hope you're excited, so start watching it now!.