The Space: Above and Beyond milieu includes an underclass race of genetically engineered and artificially gestated humans who are born at the physical age of 18, and are collectively known as In Vitroes or sometimes, derogatorily, "tanks" or "nipple-necks". The In Vitroes have replaced the previous underclass, the artificial intelligences known as Silicates. These human-looking androids, referred to as "walking personal computers", have rebelled, formed their own societies, and wage a guerrilla war against human society. The Silicates are also suspected of having some involvement with the Chigs.
According to the producers, the main fictional work that influenced Space: Above and Beyond was the 1974 science fiction novel The Forever War by Joe Haldeman, in addition to other fictional works such as the 1948 World War II biographic novel The Naked and the Dead by Norman Mailer, the 1895 American Civil War novel The Red Badge of Courage by Stephen Crane, and the Iliad, and the 1962 television series "Combat!." At the same time, Space: Above and Beyond also shares conspiracy elements with other television shows co-produced by the same team, such as The X-Files and Millennium.
Tellus was a Roman Earth Goddess, the counterpart of the Greek Gaia