About this episode

The episode discusses the impact of a crystal entity on Sheppard and the crew in SGA S4E4 'Doppelganger'.

A crystal entity turns Sheppard into every crew member's nightmare in SGA S4E4 "Doppelganger." Lisa Jones, Jeff Haecker, and Victor Lams tackle fear-feeding aliens, Heightmeyer's death, and what Robert C. Cooper called his "Nightmare on Atlantis Street." The post Doppelganger (SGA) appeared first on StarQuest Media .

People in this episode

Host: Lisa Jones

Guests: Jeff Haecker, Victor Lams

Topics covered

• fear-feeding aliens
• Heightmeyer's death
• Nightmare on Atlantis Street
• SGA
• Doppelganger
• science fiction
• television

Keywords

• Doppelganger
• SGA
• Sheppard
• Heightmeyer
• Robert C. Cooper
• fear-feeding aliens
• Atlantis

Mentioned in this episode

Books & works: Doppelganger, SGA S4E4

More episodes of Secrets of Stargate

• Tabula Rasa (SGA) · July 17, 2026 · 34 min
• Travelers (SGA) · July 10, 2026 · 39 min
• Reunion (SGA) · June 26, 2026 · 41 min
• Stargate SG-1 Complete Series Retrospective · June 19, 2026 · 1h 4m

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