Buffy The Vampire Slayer: 8 Most Outrageous Fan Theories You Won't Believe

5. Dawn's Creation Caused Joyce's Death

One of the most tragic moments of Buffy was when her mother passed away, having previously developed a brain tumour. The sight of Joyce Summers lying dead on that couch was a haunting one, and I'm sorry to have reminded you of it. However, it has been theorised that there was more to it than originally seems the case. As we know, the Monks of Dagon were responsible for planting fake memories into Buffy and everyone else when they created Dawn as the key. That means that they had to create and re-write a huge amount of memories for those closest to Dawn, i.e. Buffy and Joyce. While Buffy is a Slayer and can thus handle this matter, Joyce is mortal and there's a chance that this had a huge impact on her brain, leading to the development of the tumour. Not a pleasant theory, admittedly.