Proof of what Russell T. Davies is capable of when he tries. This story is tense, gripping and feels like an old Twilight Zone episode. The Monsters Are Due on Maple Street, perhaps. It completely disarms the Doctor by taking away his greatest weapon. No, not the horribly overused sonic screwdriver. Instead it takes away his voice, and he has no idea how to fight back. Its a very dark, very claustrophobic sort of story thats made all the creepier when you finish it, and you realize that at no point did we find out who or what was behind the whole thing. No other Doctor Who story has done that, and Im glad this one did, because, given that this was Davies, any answer likely would have involved farting, an oral sex joke, or possibly both at once.