Details
- Season
- Season 4
- Episode
- S04xE04
- Air Date
- 18 October 2007
- Where to watch
Overview
Stargate Atlantis season 4, episode 4 — “Doppelganger” (S04xE04) first aired on 18 October 2007.
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.