Dr. Rodney McKay is a brilliant engineer who is the world's leading expert on the stargate after Maj. Samantha Carter. His abrupt personality clashed with her, but they ended up liking each other, to a point. Dr. McKay was introduced in the episode, 5.14 "48 Hours".
As acerbic as he is brilliant, astrophysicist Dr. McKay is a scientist with long Stargate experience: Temporarily assigned to Stargate Command, he matched scientific wits with Major Carter when her fellow SG-1 team-member Teal'c was cut off from the Stargate while on another world (5.14 "48 Hours") and as a Pentagon scientist parried with her again when the Stargate was approaching an extinction-level explosion (6.01 "Redemption Part 1" and 6.02 "Redemption Part 2"). He now serves as chief scientific advisor on the Stargate Atlantis team, under the leadership of Dr. Elizabeth Weir (Stargate Atlantis), and was the scientist who discovered the nature of the power source of the defense systems of the Antarctic Outpost, the Zero Point Module (ZPM).
- 5.14 "48 Hours"
- 6.01 "Redemption Part 1"
- 6.02 "Redemption Part 2"
- 8.19 "Moebius Part 1" (Alternate Timeline Dr. McKay)
- 8.20 "Moebius Part 2" (Alternate Timeline Dr. McKay)
- 10.03 "The Pegasus Project"
- Stargate Atlantis
--DeeKayP 12:35, 10 Oct 2004 (PDT)