Even if it's a really unscientific story, I mean, it has vampires, it's still one of my favorites. I love the exchanges with Romana, and the mood of the entire story. The music is also great. Is it perfect? No. Well, how many Doctor Who stories are? But for Tom to have such amazing chemistry with almost all his companions (I don't think him and Tegan were a great fit, but I could see Nyssa faring well with him) is amazing.