The First Ones
Season 4, episode 8 of Stargate SG·1 (1997) · 2000-08-18
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Episode Summary
An archaeological team makes an amazing discovery - a planet holding primordial Goa'uld symbiotes. But the planet also is home to the Unas, the first race that acted as a host to the symbiote, and the team and SG-1 are soon in danger from the symbiotes.