Well it's here, the final season of Eureka begins tomorrow on SyFy. We last left off with the Astraeus mission to Titan being hijacked by someone and forced to travel to unknown coordinates, with Allison unwillingly being dragged along for the ride. Apparently there is a 4 year time skip, with the Astraeus returning after a long journey.
I have to say I'm iffy on the 4 year time skip, but I've always loved the show so I'm sure they will make it work. As to who is responsible for what happened? I'm guessing the group Beverly Barlow belongs to.