Dimension X - The Outer Limit

A strange invisible barrier is frustrating Man's attempts to explore the depths of space. Six expeditions have been lost trying to cross it, their fate a mystery since no signal can pass through the barrier. This is the story of the seventh...

To escape a world of radioactive dust and intense gamma radiation, the survivors of the 3rd Atomic War burrowed underground and, over the next 2,000 years, rebuilt civilization. But with scant resources, such a civilization has no place for the genetically inferior... or for a geneticist who falls …

As though wiping out the Martian race with Earthborn diseases weren't enough, humans demonstrate a hostile contempt for what relics and monuments the Martians left behind—until one man with a conscience and a gun decides to stand up for the dead. Part of the Martian Chronicles future history.