Doctor Jennifer Keller is a female Tau'ri who became a doctor and joined the Stargate program, serving as part of the Atlantis expedition. After the death of Carson Beckett she became the temporary head of medicine on Atlantis, but found it difficult to cope with the pressures of the job. Despite this she helped to heal the wounded after an attack by the Asurans. However, her status later seemed more permanent. During her time in Atlantis, she has become widely accepted by the rest of the Expedition. In late 2008, she would start a relationship with fellow member Rodney McKay after he confessed his love to her while infected with the Second Childhood. At one point before the start of the relationship, McKay was challenged by Ronon Dex, who also developed feelings for her.