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Airman Walker, an SF stationed at the Gamma Site, was one of two airmen assigned to escort SG-1 and the IOA delegates from the Gamma Site to the research station on the surface after the R75 insects swarmed the facility. As he stood guard at the mouth of a cave, he was unaware that one of the insects had burrowed under his skin and entered his system. The insect laid eggs which incubated, hatched, and fed on Walker as a food source, triggering a massive reproductive cycle. He later collapsed, and when he was found dead, swarms of insects poured out of his chest and burrowed underground.

Portrayed by: Jason McKinnon

Cross Reference: Gamma Site, R75

Episode Reference: The Scourge