"We were once bound here, among the stars, long ago. Bound to remain and bound to possess . . ."
"Asmodeus' race" is a non-physical species that existed at least as far back as time of the emergence of the First Ones. The species was permanently sealed away on Earth as penalty for some transgression.
Long ago, Asmodeus' race could travel the galaxy of their free will until they were trapped on an planet that, at the time, was uninhabited. They could not leave that world and if that world were to be destroyed, so would their kind. Eventually, that world saw the evolution of sapient life, humans. As the species advanced, the cast-out aliens began taking an interest in them. During Europe's medieval era, they tried to possess countless humans, which was interpreted as demonic possession.
During the Third Age, one of these aliens, Asmodeus, possessed Simon Burke during a trip to Earth and remained within him when the young man returned to Babylon 5. Asmodeus' intention was to escape the planet and convince a servant of God to set him free while away from the planet, thus again rendering him free to dwell among the cosmos. His plan was foiled by Colonel Elizabeth Lochley, who discovered the truth about Asmodeus' plan. Asmodeus was sent back to Earth where he was exorcised by clergy of the Roman Catholic Church.
- Lochley predicts that Asmodeus and his race would all die when Sol went nova. However, when that event came to past, it was unknown whether Asmodeus' race had found a way to set themselves free or were still bound to Earth. Therefore, it is not known if this race went extinct.
- Believed by Humans to have been a source of demonic possession during the European Dark Ages, this race could be called "Demons". Nevertheless, the terms "Asmodeus' race" and "Demons" are used here only as descriptors, as no official name for this race was ever mentioned.
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