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-1"s 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.