[ And Kitty - no surprise - answers his lightness and joking with ferocity. ]

That's exactly what slavery is. Stripping someone of their agency and free will. Compelling them to do something and offering them no alternative. In this world, we tend to talk about institutional slavery - institutions robbing people of their freedom of choice - but slavery can also be technological - [ She gestures to the Doctor - ] Or magical. [ She gestures to herself. ] No matter what form it takes, though, it's still slavery.