Season: 2

Original Airdate: January 2, 2006

Writer(s): Damian Kindler

Director(s): Andy Mikita

Guest Stars
Mitch Pileggi as Col. Steven Caldwell
Kavan Smith as Maj. Lorne
Chuck Campbell as Technician
Gerry Durand as Sergeant

Synopsis: Sheppard and Weir become a threat to Atlantis when their minds are taken over by hostile entities.

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