- Rank:Civilian astrophysicist
- Function: Leading scientist on the Atlantis Expedition
- Played by: David Hewlett
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Rodney McKay, a scientist first on the Earth Stargate program and later the leading scientist on the Atlantis Expedition. He's a self-important scientist with a great deal of knowledge relevant to the stargate, but, according to Samantha Carter, has no feel for it.
When he joins the expedition to Atlantis he is very eager on being part of this expedition, and he continues to excel in many scientific aspects. Despite his anoying mannerisms and insecurities he does occasionally show endearing moments of vulnerability and bravery. Together with Radek Zelenka he works miracles with the tools at hand, but he's having troubles acknowledging other people's work.
Episodes
SG1: 48 Hours, Redemption, Part 1, Redemption, Part 2, Moebius, Part 1, Moebius, Part 2
ATL: Main character - All episodes