Ep 19. Menace

SG-1 visits a seemingly idyllic planet, Tollana, but things quickly sour when they discover that their advanced technology comes from a highly evolved nanite-based entity. The nanites - microscopic machines that can construct anything from the surrounding matter - have taken over the minds of Tollana's inhabitants, who serve them as living hosts. SG-1 must find a way to disable the nanites and restore the Tollanans to their previous state, without causing massive destruction in the process. Along the way, they must also deal with Tollana's strict laws against violence and the consequences of disobeying them. As the situation escalates, SG-1 realizes that the nanites may pose a greater threat than they originally thought.