Stargate SG-1 (1997–2007)
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1:15 | Trailer
After Sam receives an emergency call from geneticist Dr. Richard Flemming, the SGC learns that he has been working for Immunotech a company owned by Adrian Conrad, who implanted himself ... See full summary »


Peter DeLuise


Brad Wright (developed for television by), Jonathan Glassner (developed for television by) | 2 more credits »





Episode cast overview:
Richard Dean Anderson ... Colonel Jack O'Neill (credit only)
Amanda Tapping ... Major Samantha Carter
Christopher Judge ... Teal'c
Corin Nemec ... Jonas Quinn
Don S. Davis ... Major General George Hammond
Blu Mankuma ... Sheriff Knox
Vincent Gale ... Deputy / Agent Cross
Michael Eklund ... Dark-haired Man
Peter Anderson Peter Anderson ... Dr. Richard Flemming
Adrian Holmes ... Special Operations Sergeant
Scott McNeil ... Townsperson
Carin Moffat ... Snake Townsperson
Sean Tyson ... Barkeep / Agent Singer
Dave 'Squatch' Ward ... Antagonistic Bar Guy
Christie Wilkes Christie Wilkes ... Delivery Woman


After Sam receives an emergency call from geneticist Dr. Richard Flemming, the SGC learns that he has been working for Immunotech a company owned by Adrian Conrad, who implanted himself with a Goa'uld symbiote in order to cure himself. Fleming has now gone missing and General Hammond orders Sam, Jonas and Teal'c to investigate. They head to Oregon when Fleming lived and worked and learn from the local Sheriff that Fleming isn't the first Immunotech worker to disappear. The locals are acting strangely and seem to suffer from memory lapses. What they eventually find is a town full of Goa'uld and NID seemingly aware of everything that is going on. Written by garykmcd

Plot Summary | Add Synopsis




USA | Canada



Release Date:

12 July 2002 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:

Stereo | Dolby Digital (Dolby 5.1)



Aspect Ratio:

16 : 9
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Did You Know?


The name on Agent Cross's jacket is P. Mullie. Paul Mullie wrote 49 episodes of Stargate, including this one. He was also executive producer/supervising producer/co-executive producer/producer/co-producer (148 episodes, 2000-2007) See more »


When looking at the missing professor's computer, Carter brings up the My Computer window, which shows 0 used space on the C drive. At least some space should be used by the OS. See more »


[Jonas is having a burger, fries, and milkshake for lunch. Sam arrives just in time to see him dunk a fry in the shake and eat it]
Sam Carter: Nice... lunch.
Jonas: Mmmm. I'm really starting to enjoy this, uh, "Traditional American Food." Mmm.
Sam Carter: We have another tradition. It's called "hardened arteries".
See more »


Features Stargate SG-1: Secrets (1998) See more »


Main Title
Written by Joel Goldsmith and David Arnold
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Frequently Asked Questions

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User Reviews

Invasion of the Body Snatchers
24 April 2017 | by claudio_carvalhoSee all my reviews

Sam receives a mysterious phone call from the scientist Dr. Richard Fleming in the middle of the night telling that Adrian Conrad's project is still operative; then she hears a car crash and the call ends. On the next morning, the SGC learns that he works for Immunotech and Sam, Teal'c and Quinn are assigned by General Hammond to travel to Steveston to investigate the case. The local sheriff tells that Dr. Fleming is missing and his laboratory was burned to the ground. They go to his house, but is totally clean. Out of the blue, the postman arrives and delivers a package from Dr. Fleming to Dr. Fleming. Sam opens the box and finds a syringe with a liquid. Soon they note that the residents have a strange behavior. What is the mystery of Steveston?

"Stargate SG-1 – Nightwalkers" uses the storyline of the classic "Invasion of the Body Snatchers" using symbiote. The result is a good episode without the participation of O'Neill. Sam is great as the SG-1 leader. My vote is eight.

Title (Brazil): "Nightwalkers"

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