Enterprise attempts to discover the fate of the Illyrians, a race of humanoids who genetically modified themselves. But while Captain Pike and Spock are trapped on the surface, the rest of the landing party exhibit strange symptoms.
U.S. air dates are in MM.DD.YY form. U.K. air dates are in DD.MM.YY form.
SciFi Stream earns a commission on purchases made through our affiliate links.
