They're in it Deep now!

Murderous monsters, scantily clad prehistoric playmates and telepathic pterodactyls inhabit the center of our world in this fantasy adventure about a manned "drill-craft" boring its way to the center of the Earth!

There's more than lava at the Earth's core. There's also Pellucidar: an underground empire where gargantuan pterodactyls torture and enslave all humanoids - including the lovely Dia (Munro). But all that could change when a surface-dwelling scientist (Cushing) and an American businessman (McClure) drive their powerful "Iron Mole" straight into Pellucidar...stirring up a great deal more than dirt, rocks and lava!