Two previously unknown episode titles were revealed on stage today at The Official Stargate SG-1 / Stargate Atlantis Convention today in Vancouver, B.C. Joe Flanigan (“John Sheppard”) made mention of “Common Ground,” while writer Martin Gero told fans they can look forward to meeting Rodney McKay’s sister, Jeannie, in “McKay and Mrs. Miller.”“Currently, as we speak, Brad [Wright] is at home being miserable rewriting that episode,” Flanigan said of “Common Ground.” The episode will delve into some characters’ backstories, particularly John Sheppard’s participation in the armed forces.Gero said that “McKay and Mrs. Miller,” currently slotted as the eighth episode in production order, was difficult to write because “for the first act and half it’s just McKay and his sister on Earth.””I’m really excited about that episode, and I hope you guys like it,” Gero told the audience.Stay tuned to GateWorld for more on these episodes in the days ahead!