DOCTOR: My Granddaughter, Susan! My friend Adric, who gave his life trying to save others! I have great faith in these people, whatever your name is, and if there's one thing you can count on in this turbulent and uncertain universe it's that I'll never allow any of them to come to harm if I can possibly... help it!

"Fake?" The Doctor dabbed at his wounds once more. "Tegan, I hate to tell you this, but if we don't get this sorted out soon, you may have to start locking your door at night. I wonder what it's like, being a vampire?"