Stargate Atlantis

Season 3 Episode 20

First Strike (1)

3
Aired Friday 10:00 PM Jun 22, 2007 on Syfy

Trivia

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  • Trivia

    • This episode marks the first appearance of the Horizon, a tactical weapons system on board the Apollo. It consists of a delivery module containing ten missiles, six Mark IX "Gatebuster" nuclear weapons that were first featured in the Stargate SG-1 Season 9 episode "Beachhead" and four decoys.