After a lifetime of constant abuse--both emotional and physical--by those around him, young Billy Duncan stumbles across an abandoned alien weapon that provides him with the ultimate method of revenge. But the weapon's power source begins to mutate Billy's mind and body, and soon no one can stop the deadly creature's terrifying rampage. In this, the final Comedy Central episode of Mystery Science Theater 3000, Mike Nelson, Tom Servo and Crow T. Robot celebrate the end of seven hysterical seasons by watching one of the worst films ever made . . . Laserblast!