The Monster That Challenged the World

“A new kind of terror to numb the nerves!”

In 1957, an earthquake shakes the Salton Sea in California and frees giant mollusks from the ground beneath it. They begin killing people near the water, and Lt. Cmdr. John Twillinger (Tim Holt) and Dr. Tad Johns (Max Showalter) are drawn into finding out why. Arnold Laven shoots it in black and white, as the top half of a double feature with The Vampire.