Laserblast

Roddy McDowall,Cheryl Smith,Keenan Wynn,Eddie Deezen

Alien creatures kill a mutated alien creature in the California desert. Its remains, and the high-tech laser gun and power source accidentally left behind, are found by an ostracized teenager. However, the power source causes the teenager to mutate too, and he goes on a murderous rampage.—Leo L. Schwab