Perhaps not. But you also aren't certain of that, are you? We don't know what will happen. The fact that I am here, and not just a fading memory of my time says one of three things.

[Is this conversation even relevant at the moment? Maybe. The more he knows about their timeline the more he might be able to change things for himself.

When he gets back.]

Time has not caught up with the future. Or perhaps you fail all together. ... Or the timeline split all together. For me, you're still dead.

Now I suppose a fourth option could be in effect. This place --

[He gestures slightly at their surroundings.]

Could be out of the bounds of time all together and no effects will be felt until we return. Which leads to another hypothesis ... would killing you here effect time there? Curious isn't it?