You could cast Saffron Burrowes as "Ardeth", some Cockney gang-family babe with an ex-SAS ex who'd picked up a lot of tricks while he was using her for a punching bag, then run them back on him before disappearing into a mechanic's life. Think of her explaining: "Yeah, well, that's 70% of it right there, innit? Most men don't fink a woman can kill 'em, outside of bed. So even if they see you comin', they don't really see you comin'..."
no subject
I'd read it.