Mm. Tomb is really the only time I think they’ve been used well — as objects of creeping fear and mystery. There’s a sense they’re this contained force; they’re the snakes in this box that you absolutely must keep closed. And they just keep charging forward, blank, expressionless, incomprehensible. They’ll charm you, try the back door, use every crack to their advantage. (Much like Captain Jack?)

Mostly they’re just used as generic shuffle-monsters. Or, in the ’80s, alien race. Or as a droll bit of wank, as above.

Actually, I thought that Cyberwoman did a good job at capturing their threat. They’re like a plague, is what they are. A schlocky B-movie plague. The kind of thing you should be making up arbitrary rules to protect yourself from. Don’t dangle your feet over the bed. Don’t step on the red squares.

I’d like to see Moffat write for them.