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Bates in the Stargate Atlantis Season 1 episode, "Suspicion".
Biographical information


Home planet





June 20, 1980

Political information

E-5/Sergeant (honorable discharge) - IOA Special Agent


International Oversight Advisory, formerly Atlantis expedition

Out of universe information

Bates - List of Appearances


Dean Marshall

Bates is currently an agent for the International Oversight Advisory. He originally held the rank of Sergeant in the United States Marine Corps, having been assigned to the Atlantis expedition under the command of Colonel Marshall Sumner and later Major John Sheppard until he had a near fatal encounter with a Wraith in 2005 which ultimately resulted in him receiving an honorable discharge and later joining the IOA as a Special Agent.



During the first off-world mission to Athos, Bates, Sumner and several other Athosians were taken by the greatest threat in the Pegasus Galaxy; the Wraith. Bates and most of the Athosians were rescued by a Marine team led by Major John Sheppard, though Sumner was killed. (SGA: "Rising")

In the months following, Bates was pointed Internal Head-of-Security for the base, under Sheppard's command (who had become ranking officer in the wake of Sumner's death). Whatever chances of a friendship between Bates and Sheppard were seriously weakened when, during a time where the Wraith somehow gleaned intelligence on the Expedition's off-world missions, Bates suggested harsh new security measures to Sheppard and the Expedition Commander; Dr. Elizabeth Weir. Bates' requests were partially approved, badly straining the relationship between the Atlanteans and Athosians, and eventually drove them to settle on the mainland. The situation between Bates and Sheppard worsened when Bates centered his investigation on Teyla Emmagan, and exposed her as the unintentional spy. (SGA: "Suspicion")

After the capture of Steve the Wraith, Bates was put in charge of security around the Atlantis brig in which Steve was held. (SGA: "Poisoning the Well")


When an Ancient nanovirus was released from the Nanite lab, he and Dr. Elizabeth Weir instituted a quarantine. He was then ordered by Major John Sheppard to open the doors of the gym. He followed the order despite Weir's own orders not to. (SGA: "Hot Zone")

When a Wraith Dart was detected heading toward Atlantis, he and Dr. Carson Beckett piloted a Puddle Jumper to take it down, but it self-destructed before Carson was able to get a clear shot. (SGA: "The Brotherhood")

On a personal level, Bates had a younger brother who he was close to, and fondly recalled their time together seeing the L.A. Lakers Basketball team when he had the opportunity to send a video message back to Earth. (SGA: "Letters from Pegasus")

Bates continued his duties in Atlantis, harboring his opinions that Teyla Emmagan was a security risk. These fears were exacerbated when it was revealed Teyla was a Wraithkin, and as such retained a mental connection to the Wraith which Bates believed exposed the location of their Alpha Site. Believing the Wraith could control her mind, Bates was present during another experiment with the link, and shot her with a Wraith stunner rifle when she fell under their control. (SGA: "The Gift")

Bates attacked

Bates is attacked by Bob.

Hours before the Wraith arrived, things came to a head between Teyla Emmagan and Bates. They argued, which culminated in Bates accusing her of being in service to the Wraith, which is a serious insult among the Athosians. Bates says that is his point, after which Teyla punches him. Later, when a Wraith fleet approached the mostly undefended city, Bates was badly injured in an encounter with a Wraith infiltrator named "Bob", while attempting to stop him from sabotaging the city's Naquadah generators. Bates was then sent back to Earth upon delivery of a Zero Point Module by the crew of the Daedalus along with other injured expedition members. (SGA: "The Siege, Part 1")


Bates IOA

Bates of the IOA.

Due to the injuries that he sustained, and likely his incompetence while a security chief in Atlantis, Bates was honorably discharged from the United States Marine Corps, but shortly afterwards was contacted by the International Oversight Advisory and offered a job as a Special Agent in the IOA Field Operations Division, dealing with alien threats on Earth.

Bates accepted and, in the course of his duties, aided Lt. Colonel John Sheppard and Ronon Dex in tracking the renegade Replicator. When the replicator was cornered, he was paired up with Dr. Richard Poole. Poole struck him on the head with a board to knock him out. (SGA: "Outcast")

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