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The team explores a mobile geothermal drilling platform, hoping it can provide a new, nearly infinite power source for Atlantis.

The episode features classic Rodney humor, including a running gag where he fails to remember the name of a subordinate scientist, Graydon. Submersion | SGCommand | Fandom

This guide covers , the 18th episode of Stargate Atlantis Season 3. In this atmospheric, "underwater-themed" thriller, the team discovers an Ancient drilling facility deep beneath the Lantean ocean, only to find they aren't alone. Episode Overview [S3E18] Submersion

Fans often note that Teyla is psychicly compromised or "taken over" in the 18th episode of every season up to this point.

The Queen activates a self-destruct sequence on her crashed cruiser. Because the facility sits on a very thin part of the planetary crust, the resulting explosion would trigger a volcanic cataclysm capable of destroying the platform and Atlantis itself. The team explores a mobile geothermal drilling platform,

The episode is noted for its "spooky" and claustrophobic feel, often compared to the movie The Abyss . Key Plot Points

Teyla senses the Wraith presence immediately upon arrival. The Queen eventually takes control of Teyla's mind to use her as a puppet to facilitate her escape. Because the facility sits on a very thin

An ancient Wraith Queen (portrayed by Andee Frizzell) has been hibernating in a nearby crashed cruiser for 10,000 years. She survived by feeding on her own crew after her ship was downed during the original siege of Atlantis.