10 Most Pitiful TV Plot Twists Ever Created

First things first, Buffy The Vampire Slayer was incredible and is up there with some of the best television shows of all time. Yes, in 7 seasons, Buffy rarely put a foot wrong and is responsible for upping the game and providing the world with the legendary musical episode.

However, that doesn't mean that they didn't make the odd mistake now and again, after all, they are only human... or vampire.

The introduction of Buffy's sister was a real, "huh?" moment for audiences across the globe, along with the ridiculous explanation as to why she appeared in the first place. One minute, it was Buffy and her Mum and the next, she had a sister that had actually been there the whole time. Again, "Huh?"

Thankfully, people warmed to the sister, although it did take a while, with Michelle Trachtenberg's portrayal of the moody teen one of the reasons why fans were finally won over.