The Queen

Teyla is posing as Todd's (Christopher Heyerdahl) Wraith Queen, giving him the authority to enter talks with another hive and its Queen in order to get the Wraith to use a new gene therapy to eliminate their need to feed. It's not too long before suspicion is cast upon them after Todd kills the other Queen and they must work together to maintain their plot. Teyla ends up taking the Queen's hive into battle with a rival hive in order to kill as many Wraith as possible. Teyla's hive is nearly destroyed, but Sheppard and the rest of the team arrive in a Puddle Jumper and severly damage the other hive, allowing Teyla's hive to destroy it. The team is captured and Teyla's interactions with them cause the suspisious Wraith to try to kill her, but Todd saves her and kills the Wraith. Teyla leaves Todd in charge of the hive and its alliance and returns to Atlantis where she is returned to normal.