that more about the Furlings would finally be revealed in SG-1s tenth season, which turned out to be an imagined scene from a movie script based on the fictional television series "Wormhole X-Treme!", a parody of Stargate SG-1 set in the Stargate SG-1 universe. The Furlings were depicted as Ewok-like, or Koala-like creatures that are destroyed by the Goa'uld soon after making contact with SG-1. Goa'uld The Goauld are the primary adversaries in Stargate SG-1 from seasons 1 to 8. Stargate SG-1 creators Brad Wright and Jonathan Glassner established in SG-1s 1997 pilot episode "Children of the Gods" that the film's unnamed alien race and the Goa'uld are the same. As such, the look of the series' Goa'uld, including the early archvillain Apophis, was based on Ra in the feature film. The Goa'uld are introduced as the first and most prominent alien race in the Milky Way, and are also one of the few nonhumanoid species to appear in the early seasons of the series. They are a parasitic species that resemble finned snakes, which can burrow themselves into a humanoid's neck and wrap around the spinal column. The Goa'uld parasite (generally referred to as a "symbiote") then takes control of its host's body and mind, while providing longevity and perfect health. The Goa'uld are branded as evil by their pretending to be gods and forcing people to submit to their quasi-religious pronouncements. The most powerful Goa'uld in the galaxy are collectively known as the System Lords. The fictional backstory is established over the course of the series. In season 4's "The First Ones", it is stated that the Goa'uld evolved on the planet P3X-888, where there are still populations of primitive Goa'uld. Their original hosts were the Unas (meaning "First Ones"), a race of large and primitive humanoids also native to the planet and whom SG-1 had first encountered in season 1's "Thor's Hammer". The Goa'uld then found and ruled over Earth for thousands of years, masquerading as gods from ancient mythologies and transplanting humans throughout the galaxy to serve as slaves and hosts. A faction of Goa'uld symbiotes named the Tok'ra (meaning "against Ra"), whom SG-1 first encounter in season 2's "The Tok'ra" and become close allies with, formed in opposition to the Goa'uld culturally and militarily millennia ago to live in true symbiosis with their hosts, both beings sharing the body equally and benefiting from each other.