P3K-447 was a planet in Milky Way galaxy which held a Stargate. P3K-447 are inhabited by people who live in caves. Stargate Command has studied their culture and language for some time which lead to Dr. Lindsay being fluent in the cave people's as of yet unnamed language when she applied for a post at SG-1, whilst Lt. Colonel Cameron Mitchell assumed command over the unit. (SG1: "Avalon, Part 1")

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