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P4X-377 is home to alien life forms to which radio waves are a disease. When the radio waves from the SGC's MALP affected the life form, they repdudiated by attacking in a feedback wave to the SGC in an attempt to destroy Earth and preserve their world.


  • Names and Designations: P4X-377
  • Number of Suns: Unknown
  • Number of Moons: Unknown
  • Source of Address: Ancient Repository
  • Introduced in Episode: 4.20 "Entity"
  • Earth Cultural/Technological Equivalent: Alien species
  • Main Interest: Exploration
  • Influenced/Dominated by: Alien entity
  • History of Stargate: Unknown

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Geopolitical Structure and History

A city was in the area immediately around the Stargate. Since the aliens that existed there are a relatively unknown life form, it is difficult to tell if this was their culture, or one abandoned by another species. Dr. Daniel Jackson studied the small bit of video footage from the planet, but could not link it to any ancient culture on Earth.

The species that existed there were susceptible to radio waves. When the SGC sent a MALP and transmitted and received radio waves from the device, the link became a contagion that killed many before the source could be located. At some point, the MALP was lifted and transported further into the city. The means of transport was unknown. To the SGC, it appeared the MALP was flying. Believing the radio signal to be an attack, the natives sent one or more of their number back through the Stargate as feedback on the radio waves to destroy the attacker and save their world.

P4X-377 was locked out of the SGC dialing computers. The Entity itself that attacked the base was eventually destroyed, but not before it had possessed Samantha Carter, almost killing her.


P4X-377 Stargate area
Last MALP image of P4X-377
Entity first arrives at SGC


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Aurora 06:42, 14 June 2006 (PDT)