As I said in the General Forum Thread, I liked the ending. (Ducks and dons flame proof suit) I always like stories messing with the time-line. Sliders was cool in that respect, each Earth was different in some way, little or big. I agree with the posts that tag this as an alternate time-line, not having traveled through time again. They did somewhat set this up in the very first show with the "Temporal Cold War" deal. How destroying the spheres and the weapon count towards the new history is tough to guess...I'm tuning in just to see how in the (bleep) they are going to explain all this.
Hopefully, it won't be the second Enterprise reset button episode.
One thing, if history was changed, it means we don't have to listen to those #*#&^@^%@% I'm loving it commericals anymore!