"I was a soldier in the Last Great Time War, just like you, Doctor. I found I was quite well suited to the task of fighting Daleks. Anyway, I was given a task from the commanding officers towards the end of the war, when we had the Daleks on the run. The Daleks were building an outpost on an planet just outside the universe. Once it was done, they would retreat to it, then detonate a doomsday device to kill everyone in the universe. I guess they had the same idea as Hitler; if they couldn't have it, no one could. So I was told to destroy the outpost, so they had nowhere to run. They gave me this TARDIS, and sent me on my merry little mission. Long story short, I did the job, but by the time I got back, you had already set off the device and killed everyone. It's ironic, huh? I stop the Daleks from setting off a doomsday device, then a Time Lord goes and does it. So I'm standing in the middle of the aftermath, thinking "Right. What now?" and I decide to do kind of the same thing you did, Doctor. I went wandering, and stepped in where necessary. Except, you know, I was willing to blow something up to get results." Rose glanced at him. "So, what do they call you? Like, I know his name isn't the Doctor, but I still call him that. So what do I call you?" The man turned to her and grinned. "Me? I'm The Vigilante."