In the finale to Doctor Who's 8th series, *Death in Heaven*,

> 
>  where did the newly created Cybermen's armour come from? I mean, they rose from their graves already fully suited up. Not to mention the fuel to drive their thrusters!
> 
> 
> 

I was hoping this would be mentioned, at least in passing, but everybody totally ignored it, as if it was normal. Unless I'm missing some clue?

(Oh, and if anyone can improve on the title, while still keeping it informative and non-spoilerish, I'd be delighted!)