Tesh

The Tesh were a group of humans descended from the technician survivors of the Mordee expedition. They had technical knowledge and psychic abilities. They also prided themselves on maintaining great control over their emotions. They were bred to be enemies of the warrior tribe, Sevateem, as part of an experiment by the mentally-unstable computer Xoanon. Both the Tesh and the Sevateem worshipped Xoanon as a god. (DW: The Face of Evil)