For millennia, the Ancients have reigned supreme as the most-advanced race in known history, establishing a vast network of stargates and colonizing countless worlds. Every species yet encountered by Earth has paled in comparison to these vanished precursors to humanity, but what if they were not the first? What if, at a time when even the "Ancients" were young, another civilization had grown old? Now, with the help of the Alliance archives on Heliopolis, SG-1 travels to a remote planet who's address was locked out by the Nox, curious as to what might lay hidden there... and awakening something their deceased allies never wanted to be able to see the light of day again.
"The Forerunners" will not feature any prominent guest stars.