The Terror Within / The Terror Within II Double Feature [Shout Factory Blu-ray]

The Terror Within:

In the aftermath of a chemically induced plague that wipes out most of the world, the only survivors are a small group of scientists trapped in a laboratory 500 feet below the ground in the Mojave Desert. But they are not alone…​

The Terror Within II:

In a world gone mad, the last human colony struggles to survive underground, beneath a land of nightmarish mutants who seek to destroy them. But when the mutants break inside humanity's final stronghold, the battle for survival pits the human colonists against their deadly invaders miles below the Earth's surface. ​