Lyle Pender is a Hebridan human, and a convicted criminal. He was being transported to the prison asteroid aboard Warrick Finn's vessel Cerberus when it crashed on P2X-131, after which Lyle and two other human prisoners, Aiden Corso and Tanis Reynard, had seized control of the vessel and killed several crew. Two crew, both Serrakin, had escaped. There, SG-1 found the crashed vessel, along with the prisoners, who concocted a story that they were what was left of the ship's crew, and they were being systematically killed off by aliens that had been found on the planet. SG-1 offered to help repair the vessel, but were leery of helping the castaways deal with th aliens, also. Only two had been spotted, they were dressed like humans, armed with Hebridan energy weapons, and Lyle Pender had killed one that Jack had wounded in order to capture him. The wounded Tanis Reynard was taken to Earth for care by Jonas Quinn, while Samantha assisted Aiden with repairs, and Jack and Teal'c sought out the surviving serrakin with Lyle Pender. Lyle was overly eager to kill the last of the serrakin, and eventually returned to the freshly repaired ship, to find that Aiden had zatted Carter unconscious. They prepared to leave, alone, when Tanis Reynard showed up and told them that she'd duped Quinn out of a stargate address to a world filled with gold and jewels. They chose to use the stargate to go there, but found themselves transported to Earth, where they were taken into custody. All three prisoners were returned to the custody of Warrick, who took them to prison aboard the repaired Cerberus.