The first Jonny Quest series came to an end with the episode titled "Riddle of the Gold," which was originally slated to be shown as episode five. The Quests' perennial adversary, Dr. Zin, is back, this time plying his perfidy in India. Investigating a gold mine that has suddenly become active years after it was tapped out, Dr. Quest and his son, Jonny, discover that Dr. Zin has hatched a scheme to become the wealthiest man in the world by manufacturing synhetic gold. The good guys' task now is to live long enough to notify the authorities. Originally telecast in the middle of "rerun season" on April 15, 1965, "Riddle of the Gold" would be the last first-run Jonny Quest episode to be telecast until the property was revived by Hanna Barbera in 1986. ~ Hal Erickson, Rovi