While the Goa'uld threaten to attack Earth, SG-1 and the Asgard make a last, desperate stand against the Replicators, which have captured Major Carter and invaded the last outpost of the Asgard civilization.

Adam Behr, Amanda Tapping, Barclay Hope, Brad Proctor, Chelah Horsdal, G. Patrick Currie, Geoff Redknap, Jeny Cassady, Kevan Ohtsji, Kira Clavell, Michael Shanks, Paul Hoosen, Steve Bacic, Todd Masters, Torri Higginson