SuperFriends (1978)

Battle at the Earth's Core (1x3)

Air date: Sep 23, 1978

Jayna and Zan disappear while on a trip out to sea. When the SuperFriends go to find them, they are pulled into a whirlpool and are taken to a strange subterranean land at the Earth's core. There they must battle dinosaurs and tar creatures in order to save the Wonder Twins.