An oil-drilling operation discovers a passageway to the center of the Earth. The Quests are on the tracks of the scoundrels when they stumble upon a creature of living rock named Hardrock that joins forces with Jonny and his friends.

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Writer:

(as Mark Edens)

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Cast

Episode credited cast:
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Jonny Quest (voice)
Don Messick ...
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Hadji (voice)
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Hard Rock (voice)
...
Race Bannon (voice)
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Storyline

An oil-drilling operation discovers a passageway to the center of the Earth. The Quests are on the tracks of the scoundrels when they stumble upon a creature of living rock named Hardrock that joins forces with Jonny and his friends.

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Details

Release Date:

2 November 1986 (USA)  »

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