Doppelganger S4E4 - Doppelganger 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.
- Released: 2007-10-18
- Runtime: 50 minutes
- Genre:
- Stars: Joe Flanigan, David Hewlett, Rachel Luttrell, Amanda Tapping, Jason Momoa
- Director: Robert C. Cooper