Atavus

The Atavus are a fictional race of humanoid aliens appearing in the Earth: Final Conflict science fiction series. Several variations of Atavus have been observed in the series and their supposed history is confusing. The three versions of the Atavus are the Season 2 "monster" version, the season 4 combined Taelon-Jaridian version, and the Season 5 "Energy Vampire" version. All have been called the Atavus.