Clara | John
I doubt that would do much good. Rule one
I don't know if you've ever come across the ones that I guess...go under cover? Convert living DNA, let them retain their memories except their death so they can be used as a trap. That's how they got him to go. Get the Doctor, lower the shields so they can destroy the Asylum and no longer worry about the ones there escaping. That was a year after she -- I -- crashed there.