John Sheppard returns to Earth when his father passes away after suffering a heart attack. With Ronon accompanying him for support, Sheppard finds that his brother Dave has made most of the arrangements and he even sees his ex-wife Nancy. At his father's wake, he's approached by Ava Dickson who is aware of the work the Atlantis team did for Henry Wallace. She and Dr. Richard Poole have actually built a Replicator using the nanite technology they left behind. The only problem is that the Replicator has now escaped and they need help to track it down. As they dig deeper into Dr. Poole's files, it's what they learn about Ava that is most interesting.
—garykmcd