Alarm bells rang in Billy's head. If this was anything like the usual scenario, things could get ugly. The Doctor could probably negotiate, but he didn't exactly look like a warrior.

Then again, neither did Billy. But for his sake...well, this was bound to lead somewhere interesting, and part of him now felt responsible for keeping the man safe. How that happened, he would never know.

"All right. I'll see this through," Billy agreed, sealing his fate with a handshake. "So...where to?"