A gravitational disturbance near P3X-584 catches Carter's attention, but when SG-1 'gates to the planet, they find something even more fascinating than a mere black hole. First, there's the elaborate security system on P3X-584's stargate, which re-routes incoming travelers to other planets until Carter cracks its access code. Second, there's the mysterious underground laboratory on the planet itself. The lab contains a Goa'uld DNA manipulation device, computer logs filled with Ancient text, and a man frozen in a stasis pod. SG-1 sends the man, Khalek, to Earth. He claims he was a prisoner of a Goa'uld, but, by translating the records in the lab, Daniel learns the truth. The Goa'uld was Anubis, and Khalek was not his prisoner - Khalek was his creation. Anubis engineered him with human and Goa'uld DNA, gave him the genetic memory of the Goa'uld, and artificially advanced his evolution. Although Anubis was defeated before he could finish this prototype, Khalek already has superhuman abilities. Worse, he has evolved almost enough to Ascend - to become an immortal energy being. Given his background, there's no doubt he'll use his immense powers for evil. Daniel surprises everyone by arguing that Khalek must be executed. Gen. Landry takes this warning seriously, although Daniel himself has second thoughts when he realizes that killing Khalek might actually enable his Ascension. In the end, the decision is out of their hands: Stargate Command's oversight committee dispatches Richard Woolsey, with orders to keep the prisoner alive for study. The dangers of this plan quickly become clear. As Carter and Dr. Lam conduct a brain-scan, Khalek unleashes his telekinetic powers and nearly escapes before Mitchell subdues him. Despite this close call, Woolsey still insists that the potential rewards of the study outweigh the risks. He orders unprecedented security measures and the project continues. Back at Anubis's lab, Carter, Daniel and Teal'c run a simulation using the DNA manipulation device. They discover that Khalek can't Ascend until he has another few treatments in the machine. Daniel's first instinct was correct: If Khalek can't ever be confined safely, he should be killed before he can return to P3X-584 and complete his evolution. When SG-1 reports back to Landry, Khalek overhears every word, even though he's several floors away. Once again, he lashes out with his mind, and this time, he escapes. The team's superhuman prisoner is now loose on the base.