“First Contact” is episode ten of season five of Stargate: Atlantis.
Dr. Daniel Jackson guest stars in this episode. He has discovered that an Ancient inventor had a secret lab, the exact location of which could be found in the database, and the lab is in Atlantis. Rodney is asked to help him, but he is not too happy about this, believing it to be a waste of his valuable time.
Dr. Keller meanwhile is going on Daedalus to meet Todd the Wraith and apply the gene therapy to a number of Wraith so that they no longer need to feed on humans. She is also accompanied by Ronon, something else Rodney is not keen on.
Rodney and Daniel find the lab, triggering an alert which summons an alien ship. The armoured crew of the ship steal something from the lab, and kidnap Rodney and Daniel and demand that they fix it. The device’s effects when activated causes Todd to believe he has been betrayed, causing problems for the Daedalus, and the side effects cause problems for Atlantis – and potentially everyone else in the Pegasus galaxy.
Neither storyline concludes in this episode but continue into the next, “The Lost Tribe”.