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.

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.

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

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

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

Sheppard and McKay use 10,000-year-old Ancient diving suits to reach the cruiser. Teyla uses a mental "counter-bluff" to trick the Queen into deactivating the self-destruct codes, allowing Sheppard and McKay to eliminate the Queen and save the city. Fun Facts & Trivia