City Beneath the Sea (1971)

Overview

In the futuristic underwater city of Pacifica, a group of colonists thrives amidst advanced scientific endeavors. However, the U.S. government has ulterior motives, seeking to store its gold reserves alongside a groundbreaking radioactive element. Tensions rise when the former commander's brother concocts a scheme to heist the gold. Compounding their troubles, an asteroid hurtling through space threatens the very existence of Pacifica. As the clock ticks down, the inhabitants must contend with betrayal and impending disaster in a race to save their home and its secrets.