A middle eastern shiek is being terrorized by a band of outlaws riding robotic horses. Dr. Quest is summoned to put an end to the villains' activities. Only trouble is, the steel nags are completely impervious to weapons -- and they also have the capacity to kill. First broadcast on September 21, 1986, as part of the "Funtastic World of Hanna Barbera" syndicated series, "Nightmare of Steel" was later incorporated in the standard Jonny Quest package, along with the "classic" episodes from 1964-1965. ~ Hal Erickson, Rovi