Stargate Atlantis Season 4 Episode 4
Overview
During an off-world mission Colonel Sheppard unknowingly becomes host to an alien entity, which infects others in Atlantis and afflicts them with terrifying nightmares.
Director: Robert C. Cooper
Guest Star: Claire Rankin, David Nykl, Jewel Staite, Kavan Smith, Linda Ko, Yee Jee Tso