Synopsis by Hal Erickson
SG-1 heads to the planet P8XY987, there to locate another SG team that had been investigating a black hole. It turns out that a mysterious disease has wiped out the other SG and everyone else on the planet--everyone except a little girl named Cassandra (Katie Stuart). During SG-1 return to earth, Samantha Carter (Amanda Tapping) becomes close to Cassandra, only to discover that the child has been implanted by the Goa'uld with a time bomb designed to destroy the earth's Stargate. This places Carter in a quandary: Should she endeavor to protect Cassandra, or should she kill the girl to save Humanity?