"No, murders are a problem," she answers. "It might be okay for us to be forced to kill each other in a state sanctioned Thunderdome, but they treat the murder of citizens with the same concern that murders get back home. We won't have the Peacekeepers working with us to solve them, but since when did we need official sanction to solve a crime?"

She squeezes his hand again, and turns to start skating.

"We always have a choice how we react to the situation we're in. I refuse to kill anyone. And some people like that. People are the same here as anywhere. They want heroes and monsters."

It's something the other Sherlock told her when they first met.