The Monster That Challenged the World (1957)

In the placid depths of California's Salton Sea, an unexpected earthquake reveals a monstrous terror. The seismic event rouses a gargantuan mollusk, a relic of prehistory that begins its reign of terror near a military base. The first to fall prey to this leviathan are a navy skydiver testing parachutes and the unsuspecting sailors dispatched to retrieve him, leaving only a boat smeared with a mysterious white substance as evidence of their demise. As the sea's tranquility gives way to unspeakable horror, Naval Investigator Lt. Commander John "Twill" Twillinger steps into the fray. His pursuit leads him to a cryptic, large round sac, recovered by navy divers during their search for the missing men. A deadly encounter with the creature claims the life of one diver, but the deceptive calm that follows lulls them into a false sense of security. Unbeknownst to them, the sac, now transported to the base lab, is a ticking time bomb - an egg carrying another colossal mollusk. In a chilling revelation, the creature hatches within the confines of the base, closer to humanity than ever. Meanwhile, the initial monster escapes into the labyrinthine canal system of the California's Imperial Valley, sending shockwaves of fear through the populace. A group of undaunted scientists join forces with the Naval officer, launching a desperate bid to halt the mollusk monsters' rampage. This is a chilling tale of ancient horrors awakened, and humanity's struggle to quell a menace that challenges the world. As the Salton Sea transforms into a battleground, the fate of the valley hangs in the balance. Will the team be able to stop the monsters, or will they become the next victims of the monstrous mollusks? Watch as the struggle unfolds in "The Monster That Challenged the World".

The Monster That Challenged the World is a horror movie featuring Tim Holt.

It is possible to buy The Monster That Challenged the World on Amazon Video and Apple TV.