A Chinese general goes berserk and has a system of tunnels dug all the way from China to USA, under the Pacific Ocean! Wherever there is an important military base, he places atomic bombs. US Navy soldiers go underground to repel the invaders.
The Greatest Adventure on Earth...Is Under It!
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Did You Know?
In the opening scene in the police car the back projection is
shown flipped so that all the store names read backwards. This is probably because the scenes were shot in Britain, who drive on the left, but set in the USA, who drive on the right. See more
You fool! They're twenty years ahead of us! They've got tunneling machines! They're coming in under us and you sit there like an idiot!
Cmdr. Jonathan Shaw
Don't you understand they're after us? They're going to wipe us out!