Marty, there is nothing we can do about it now! We are stuck in the tower, and even if we could travel back in time, this wouldn't solve the problem since time travel is the problem. Further disruptance to the space-time continuum would only risk to have the structure of the Omniverse itself be altered. Especially if we were to do it from this tower!

[ He shakes his head and puts back his hands on his shoulders. ]

I know it's hard to accept Marty, but the best we have to do is focus on the tower. Maybe there are answers that could even help up fix our mistakes!