For Twelve generations, mankind has lived in concentration-type camps, imprisoned by the human collaborators of the alien New Masters. But when one woman dares to challenge the authority of her…

The team is called into battle unexpectedly when the Asgard homeworld is overrun by Replicators — which have evolved into a startling new form.

During an off-world assignment, Jack is struck down by energy from a blue crystal… which creates a duplicate of him that returns to Earth in Jack’s place.