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EPISODE NUMBER - 510 ORIGINAL U.S. AIR DATE - 09.26.08 WRITTEN BY - Martin Gero DIRECTED BY - Andy Mikita GUEST STARRING - Michael Shanks (Daniel Jackson), Daniella Alonso (Katana), Christopher Heyerdahl (Todd), Mitch Pileggi (Colonel Steven Caldwell), David Nykl (Radek Zelenka) Daniel Jackson visits the city of Atlantis to research an Ancient scientist who once lived there. The Daedalus welcomes a Wraith ally for a special project.

NEWS & SPOILERS (Newest information is added to the bottom) "Marty G. will do the honors for the mid-season two-parter (Welcome back to Atlantis, Dr. Jackson)." (Executive producer Joseph Mallozzi, in a post at his blog) "Daniel Jackson will be guesting in some episodes. "So far, we've got a terrific, BIG two-parter planned. I suspect that the page count in the Daniel/McKay scenes (featuring the two fastest-talking actors in show business) will have the scheduling gurus doing back-flips. Remember that new enemy I mentioned? Oh, and Marty G. will be doing the honors on this one." (Executive producer Joseph Mallozzi, in a post at his blog) "Michael Shanks will be in two episodes. So far." (Executive producer Joseph Mallozzi, in a post at his blog) "I'm booked for two guest spots for their mid-season two-parter over on Atlantis this year as just as guest. So Daniel Jackson will be visiting that world, which I think is going to be a lot of fun." (Actor Michael Shanks, in an interview with UGO.com) "It was the most cryptic, enigmatic pitch of a story I've ever heard. The pitch was: 'You go to Atlantis and something happens and Daniel has to help everybody to get rid of the bad guys that are coming.' I was like, 'Wow, did you spend a lot of time thinking that one up?' But it's one of those things. Stargate is like old home. It's always nice to be able to revisit that universe and those individuals and to play that character again." (Actor Michael Shanks, in an interview with The National Ledger) "The premise is that Daniel shows up in Atlantis to do some research," writer and co-producer Martin Gero told GateWorld. "He's been excited to come to Atlantis for five years now, and things have finally calmed down on the S.G.C. side to give him some free time. So he's coming to Atlantis to do some research on Janus. And that's all I'm going to say." Janus (Gildart Jackson) Janus, introduced in Season One's "Before I Sleep," was an Ancient scientist who fled the city with the last of the Ancients 10,000 years ago, during the first war with the Wraith. Among his inventions is a Puddle Jumper capable of time travel, seen also in SG-1's "It's Good To Be King" and "Moebius." "First Contact," however "is not a time travel story," Gero assured us. Jackson will be doing historical research on Janus and his scientific advancements. "McKay finds it very frustrating, because McKay feels like he's followed up any leads that are promising. So McKay is kind of angry -- he thinks it's someone coming over to check his work, basically, and is not the happiest that Daniel is coming to Atlantis. Also McKay is very territorial. He likes being the 'head Ancient guy.'" (GateWorld news report) Will the Travelers be returning in Season Five? "Be sure to check out the mid-season two-parter." (Executive producer Joseph Mallozzi, in a post at his blog) NEW! August 21 - "Dr. Daniel Jackson (Michael Shanks) visits Atlantis and enlists Dr. McKay's help to find a hidden lab on the station. Meanwhile, the Daedalus hosts a Wraith delegation for talks concerning Dr. Keller's research." (TV Guide episode description)

As information is listed here while the episode is still in production, remember that it is subject to change.