The characters from the Canadian-American military science fiction television series Stargate Atlantis were created by Brad Wright and Robert C. Cooper.
The Stargate has brought humanity into contact with other cultures, including new and powerful enemies: the Wraith, the Genii, and later the Asurans and a lost tribe of Asgard, all while trying to uncover the secrets the Ancients left behind.
He is an experienced and a talented US Air Force Officer in Afghanistan, though his reputation is somewhat tarnished when he disobeyed a direct order in an unsuccessful attempt to save the lives of several US servicemen.
After some doubts, he finally joins the expedition to Atlantis, although Colonel Marshall Sumner makes it clear he is not pleased about Sheppard's involvement in the mission.
Weir survives although she becomes part-Replicator due to the fact that the nanites that were left in her system during the Stargate Atlantis Season 3 episode, "Progeny" have been reactivated.
At the end of the first episode of season five, Carter is recalled to Earth for a Tok'ra extraction ceremony concerning the final Ba'al clone, with Richard Woolsey eventually replacing her as the new commander of the Atlantis Expedition.
Richard Woolsey is part of an IOA panel that recalled Dr. Weir to Earth to explain her failed alliance with the Wraith.
Woolsey later joins the Atlantis expedition on a permanent basis at the start of Season Five after his predecessor, Colonel Carter is reassigned.
He once identified himself as a Mensa member and believes himself to be the smartest person in the city, as mentioned in a conversation between Dr. Weir and Carson in "Hide and Seek".
What makes it worse for his fellow team members is that, while he does not possess the wisdom of many of the other characters, in terms of raw intelligence or at least the occasional fits of insight/brilliance, he is.
Despite his irritating demeanor, many members of the Atlantis expedition are on friendly terms with him, and McKay is able to keep steady relationships and is close to the people he works with, having referred to them as a surrogate family in a message to his estranged sister Jeannie Miller (played by David Hewlett's real-life younger sister, actress Kate Hewlett).
Ronon was later captured by the Wraith who instead of feeding on him turned him into a Runner, implanting a tracking device in his upper back and setting him loose to be constantly hunted.
Teyla Emmagan played by Rachel Luttrell is the leader of the Athosians, a human race of farmers, hunters, and traders from the planet Athos in the Pegasus Galaxy.
Elizabeth Weir selects him for the Atlantis Expedition and stationed him at the Ancient outpost in Antarctica, where the SG-1 team had defeated the nemesis Anubis in the Stargate SG-1 season seven finale, "Lost City".
In the Season 3 episode, Sunday, Beckett is killed by an exploding tumor but his clone later returns to join the Atlantis team.
Ford is diagnosed to have survived an overdose of addictive Wraith enzyme and as a result begins undergoing mental and physical changes, one of which involves his left eye turning completely black.
Upon becoming Atlantis' Chief Medical Officer, Keller faces a baptism of fire as she fights to save Dr. Elizabeth Weir who has been badly injured by an Asuran beam weapon.
Following their contact with the Expedition, the Athosians move to Lantea and their leader, Teyla Emmagan, joins Major Sheppard's team.
In the third-season episode "The Return", the Athosians are asked to leave Lantea by a group of surviving Ancients reclaiming Atlantis from Earth.
The search for the missing Athosians and their fate at the hands of the rogue Wraith Michael contributes to a major plot arc near the end of the fourth season.