I'm...not sure I'm the one to ask such a thing. I don't have the greatest track record.

I would offer to stay and keep an eye out for the companions that we could convince to stay, but with as dangerous as Odin seems to be hinting this project is, I think perhaps we might need as many Doctors as possible on this trip.

And frankly, if they insist, how exactly are we going to stop them? We could opt not to tell them, but someone will if we don't, or they'll find out on their own, and they'll try to follow us in. It might be better to just let those who insist come along. At least then we have an eye on them from the start.