Broadcast: 20th May 1950

Starring: Various

Added: Jun 13 2001

When man first crossed the vast distances of outer space to land on strange worlds he found that someone had been there before him; the ruined canals of Mars, the smashed cities of Titan and Senturus II and III. One hundred thousand years ago a race of intelligent beings built their cities across the galaxy. They knew space travel, atomic power, astrophysics and engineering. And then they destroyed themselves completely so that of all the cities on a thousand worlds only dust and rubble remained. Why? Why did these beings obliterate all record of themselves? That is the mystery of the lost race.