The Quest family goes to India to investigate the source of fake gold, but Dr. Zin is determined to stop them.


(as William D. Hamilton)

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Episode cast overview:
Jonny Quest (voice) (as Tim Matthieson)
Don Messick ...
Danny Bravo ...
Hadji (voice)
Vic Perrin ...
Dr. Zin (voice)
Maharaja / Corbin / Gunderson (voice)
Abdul Kaseem / Henchman (voice)
Airport P.A. / Stewardess (voice)
Doug Young ...
Ali / Henchman (voice)


A long-dead mine in Jahilipur, India, suddenly spits out more gold that ever before, and suspicious Mr. Corbin of Intelligence One wants Dr. Quest to look into it. Turns out it's not gold but a rare metal called zanium. Only two scientists in the world can identify it - Dr. Quest and Professor Gunderson - and Gunderson died recently in a plain crash in Jahilipur. Or did he? With so many events and shady characters tied to Jahilipur, the Quest party investigates under the pretext of attending a tiger hunt with the local maharaja. Though outwardly welcomed, numerous attempts are made on their lives. Eventually, their suspicions of an old nemesis behind it all proves correct. Written by statmanjeff

Plot Summary | Plot Synopsis





Release Date:

16 October 1964 (USA)  »

Company Credits

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Technical Specs

Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


First appearance of the series' recurring villain, Dr. Zin. See more »


When Dr. Quest re-lights the trail of gunpower at a three-quarter point, it burns only in the direction of the powder keg when it should have burned outward (both directions) from the point of ignition. See more »


Dr. Zin: And how IS the professor after his fatal accident?
Maharaja: He'll be very cooperative, he-he-he, after a little persuasion.
See more »

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User Reviews

The introduction of Dr. Zin
4 December 2008 | by (Tennessee) – See all my reviews

In "The Riddle of the Gold", the Quest gang heads to India to check out a mine that has suddenly started producing a large quantity of gold. The problem, as Dr. Quest has discovered, is that it's not real. Who's behind this attempt at passing-off a worthless mineral as gold? And what dangers lay ahead for Dr. Quest, Race, Jonny, Hadji, and Bandit in India?

The single best thing "The Riddle of the Gold" has going for it is the introduction of Quest nemesis Dr. Zin. When I was younger, Dr. Zin represented the ultimate in bad guys – seemingly unlimited resources, grand evil plans, and a desire to do harm to anyone standing in his path. Other than that, there's really not a lot to get overly excited about in this episode. The tiger hunt, one of the episode's main set pieces, never really worked for me.

One thing about this episode that I find odd is seeing Dr. Quest and family on a commercial airline. Why not take the private jet they always flew in? I suppose the writers did it to pad the script and create a few comedic moments with Bandit on the airplane. There's really no other good explanation.

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