Most of Earth's defense squadron becomes incapacitated after ingesting poisoned food discs. Buck travels to the planet of the food's origin, Vistula, with Wilma and flight instructor Duke Danton (Groh), an old boyfriend of Wilma's. On the planet, they trace the plot to a man named Kaleel (Palance) who has been selling slaves to the planet's governor (McDowall) and secretly building an attack fleet. With so few fighter pilots, Earth's defense force is now outnumbered 10-to-1. Buck must rescue Wilma from Kaleel's mountain fortress and destroy the fleet before they can reach Earth. This episode was initially aired as