Lieutenant Johnson served on the SG-3 Marine unit under Colonel Makepeace during the mission to the Land of Light. He was the first among the SGC personnel to exhibit the symptoms of the highly contagious histaminolytic virus, contracted on the planet, which caused physical and behavioral changes resembling primitive man. As his behavior became aggressive and violent, he threatened Teal'c, and was subdued and confined on the base until a cure was found.

Portrayed by: Danny Wattley

Cross Reference: Histaminolytic Virus, Land of Light, Colonel Makepeace, SG Teams

Episode Reference: The Broca Divide