How could you keep them from being 'out there'? Jack, you can't control what people do, especially when they care about you.
I'm not touchin gany of that. You're a leader. You run Torchwood. I thought you'd have more control than this. Why would you even send someone on something like this alone anyways? What if they needed someone to carry tools? Or even just a spare flashlight?
...
Everyone deserves a second chance, Jack. Everyone.