Last updated on Tuesday 21 January 2014 at 04:42 UK

Watch Stargate Atlantis - Series 3 - Episode 18 Online Free

Stargate Atlantis - Series 3 - Episode 18

http://www.iplaydownload.com/tv-series/?q=Stargate+Atlantis+-+Series+3+-+Episode+18

The team goes searching for an alternate power source beneath the surface of the Lantean ocean. When arriving at the power plant, Teyla senses a Wraith nearby.

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