Werner Pochath

The megalodon shark is the deadliest predator the world has ever seen, although scientists say it's extinct. When an underwater research station is destroyed by one of these killing machines, it's clear the scientists are wrong.

Italian master of horror Dario Argento's second directorial effort is a suspenseful murder mystery infused with the filmmaker's trademark graphic violence. Karl Malden stars as a blind man with a talent for solving puzzles who teams-up with reporter Carlo Giordani (James Franciscus) to launch a private investigation into a string of peculiar murders, all of which seem to involve a dubious genetic research facility. The killer soon becomes wise to the duo's plans and will do whatever it takes to stop them from reporting to the police.

Years after his parents are killed by a megalodon (an enormous shark that has supposedly been extinct for millions of years), Dr. Spencer is obsessed with the idea of hunting down and killing the monster. He's assigned to investigate the destruction of an undersea research station with the crew of the Argus, a giant submarine Spencer designed himself. After a little searching the team realizes that it was indeed a megalodon that destroyed the base, and the hunt for the creature is on. Will the Argus and its crew have what it takes for Spencer to get his revenge?

A blind man works creating crossword puzzles and lives with his niece. One day he is near a medical facility where they conduct experient and he overhears two men talking. That same night there is a break in at the lab and a man is killed so he starts to investigate.