Plasmatons were not efficient guards but could be used to capture others. They were generally harmless and were not good soldiers either. However, through the use of psychic power, a person could assemble the particles into something far deadlier, though it was still called a Plasmatron. A temporary field of particles could also be created to trap a person. A Plasmaton variant was used to terrorise Tegan Jovanka and Nyssa when they attempted to enter the Citadel. (TV: Time-Flight)