Doctor Elizabeth Weir is a fictional character in the series Stargate Atlantis.
Dr. Weir was a career diplomat for the United States, involved in negotiating many sensitive international treaties. She has two PH.D.s, speaks five languages, and taught political science at Georgetown University. She became involved in the Stargate program when incoming President Henry Hayes tapped her to lead Stargate Command, replacing Gen. George Hammond to put a "civillian" face on the organization. Her tenure there was brief but successful, playing a key role in defending Earth from an attack by Anubis. She was replaced by Brig. Gen. Jack O'Neill shortly afterward and went on to lead the research facility studying the Ancient defence facility that had been discovered in Antarctica. From there the Stargate coordinates for the Ancient city of Atlantis were discovered, and she was placed in command of the expedition that was sent through the Stargate to the Pegasus galaxy to explore it.
