Not much is known about the aliens of P3X-118, except that they are a unpeaceful race, who infiltrated their enemies using mimetic devices. They use the devices to transform themselves into their enemy, and use a special machine to hear their thoughts, allowing them to stealthily take the persona of any character, without anyone getting suspicious. They tried to infiltrate the SGC, however, were unsuccessful due to Teal'c's symbiote and the genetic marker left by Jolinar in Sam. This allowed her to take back the SGC and drive them out. However, when the leader was trapped, it initiated a self destruct, which killed all the remaining aliens on Earth.