Eldon was an Olesian prisoner who claimed he was falsely accused for killing a man. He suffered a slight stammer.
He was an intelligent man who helped the other prisoners create explosive weapons and cannons and calculated trajectories to shoot down Lt. Colonel John Sheppard's Puddle Jumper. He then watched Dr. Rodney McKay attempt to repair the Jumper and later released Sheppard's team from captivity in exchange for them taking him off Olesia and bringing him to Atlantis. (SGA: "Condemned")