Master villain Dr. Zin makes his first Jonny Quest appearance in "The Robot Spy" (it would have been his second appearance, had the episode titled "Riddle of the Gold" not been held back from release until later in the season). The titular creation is used by Zin to extract information about the new para-power ray gun developed by Jonny's father, Dr. Benton Quest. Naturally, once this information is obtained, the Quest party is expendable -- but the heroes aren't about to be knocked off that easily. "Robot Spy" was first seen on November 6, 1964. ~ Hal Erickson, Rovi