Synopsis for "Thunder in the Past"
Deep beneath the sea, Godzilla sleeps only to suddenly have the earth's tectonic plates shift, the resulting energy engulfing Godzilla. He awakes in the Mesozoic era, dinosaurs fleeing from his towering form. A handful of tyrannosaurs attack Godzilla but are brushed away by Godzilla's tail. Elsewhere a titanic space monster hunts dinosaurs for its dinner. When it spys Godzilla, the monster senses a challenge and attacks.
The monsters battle, unaware of the sudden approach of an object from space, a giant meteor. The meteor slams into the earth, sending a destructive shockwave across the world. As Godzilla fades back to his own time, the space monster tries to escape earth but is engulfed in the shockwave.
On the bottom of the sea, Godzilla awakens, the tip of the space monster's tail still clenched in his claws.
"When an undersea volcano disturbs Godzilla's slumber, the King of the Monsters awakens to find himself among the dinosaurs and other savage creatures of the Mezozoic era. Godzilla's in monster paradise -- until he encounters a marauding monster from space intent on driving the dinosaurs to an early extinction. It's a clash with reverberations that will be felt through the ages!"