Kevin Marks

"Major Marks, please make that ship go away."

- Col. Steven Caldwell

Kevin Marks is a Major in the United States Air Force and a senior officer aboard several Earth vessels, including the USS Prometheus, the Odyssey, the Apollo, and most recently the Daedalus.

On the Prometheus
As a Lieutenant, Marks served in an auxiliary control room aboard the Prometheus, where he used the ship's Asgard sensors to detect and map the exterior of a subterranean structure beneath a hilltop in Glastonbury Tor, England. He was able to define a large main cavern as well as a network of smaller tunnels and caves, aiding SG-1's efforts to locate a stash of treasure left there by Merlin. He was also involved in cataloguing the items recovered from the site, locating the Ancient long-range communication device among the collection. Marks later assumed a bridge post as the Prometheus' pilot, where he served during the mission to Kallana where the first Ori Supergate was encountered.

By early 2006, he had been promoted to the rank of Captain. He piloted the Prometheus on its final mission, to destroy an Ori satellite over Tegalus. When the satellite's attacks left the vessel crippled, Colonel Pendergast sent him with Lt. Colonel Samantha Carter to attempt repairs to the sublight engines; despite injuring his left arm, he did his best to assist, though their efforts ultimately proved unsuccessful. When Pendergast ordered the Prometheus' evacuation, Carter beamed him into the Caledonian Federation, though he was hesitant to leave.

On the Odyssey
Following this, he was promoted once again, to Major, and assumed a bridge post aboard the Odyssey, often but not always as the ship's pilot. When Lucian Alliance forces under the command of Anateo ambushed the Odyssey and chased it into a minefield, he was knocked unconscious and captured by the Alliance. He helped SG-1 retake the ship and assumed his post on the bridge.

Marks was again evacuated from the Odyssey after piloting the ship on its mission to Orilla; along with the rest of the crew, he was transported to a habitable planet with a Stargate where he could return to Earth after the Ori proved able to track the ship.

He was on the Odyssey with SG-1 to the Alteran home galaxy in order to find the Ark of Truth. He was on the ship to hold it off from being taken over by the rebuilt Replicators.

On the Apollo
Marks was later on transferred to the Apollo when it was upgraded with the Asgard plasma beam weapon. He was taking part in holding off the Asurans so McKay and his team could destroy Asuras and wipe out the Pegasus replicators. This seemed to be more of a temporary posting as he has been seen most recently on board the Daedalus.

On the Daedalus
Marks served on the Daedalus when it went to the planet were Teyla was held by Michael. He successfully destroyed a Wraith Cruiser on that mission.

It is revealed that he also, recently, gave Teyla training on the Daedalus' systems when the ship was in orbit over Atlantis. He offered it to Ronon, but he refused. This training came in handy when the team was stranded on the alternate Daedalus.

Later on, he was in the weapons chair on the Daedalus when Todd arrived and eventually took over. During the ship's decent towards the surface of M6H-987, he tried to regain control of the ship's systems, finally succeeding moments after Sheppard took the Daedalus and a Traveler ship through the planet in hyperspace.