Summary 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.
Directed : Unknown
Written : Unknown
Stars : Scott Menville Rene Auberjonois Rob Paulsen Barry Dennen
Genres : Action Adventure Mystery Sci-Fi Animation Family
Release date : Nov 1, 1986
Countries of origin : United States
Language : English
Production companies : Hanna-Barbera Productions
Summary 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.
Genres : Action Adventure Mystery Sci-Fi Animation Family
Release date : Nov 1, 1986
Countries of origin : United States
Language : English
Production companies : Hanna-Barbera Productions
