 Friction in "Suspicion" causes the Athosians to leave Atlantis and settle on the mainland.Teyla stays with Sheppard's team, but later helps with evacuating the Athosians from the mainland several times in the face of various threats.In season 1's "The Gift", Teyla and the Atlantis expedition learn that her ancestors were experimented on by a Wraith scientist, and that Teyla is one of the few Athosians who possess trace amounts of Wraith DNA which enable her to sense the Wraith through their telepathic network.