Fridge / Stargate SG-1 S3 E14 "Foothold"

• The Stragoth have some kind of viscous pearlescent purple substance that may well be their blood. Yet; when Teal'c ambushes 2 security guards trying to buy time for Carter's escape, they bleed red. It's possible that the Mimetic imaging device is disguising the blood, but it's also possible that the infiltration was still on-going. Those two security guard may have been human and not yet replaced. After all; the room the real people were being kept in is not big enough for a facility the size of the SGC.