Editing Civilizations in Babylon 5 (section)

==Thirdspace aliens==
{{Main article|Thirdspace Aliens}}
The '''Thirdspace aliens''' are large, octopus-like creatures. Little is known about the species, but they appear to be powerful telepaths. The aliens also have a concept they call ''"The One."'' It is not clear if this is the leader of the aliens, their deity, or perhaps a unified race-consciousness. Their philosophy is that they are the only ones worthy of existence. Thirdspace aliens are older than the Vorlons (perhaps even older than the Shadows) and possess fearsomely advanced technology. Their single-occupant fighters fire powerful fireball batteries that can cripple White Star ships with a single hit, and their warships are large cannons wrapping orb-like power sources.  They are also the only species in any universe known to possess deflector shield technology.

Over a million years ago, the Vorlons built a jump gate to open a doorway to what they believed was the source of life. The gate actually opened up into the Thirdspace aliens' dimension. The aliens took control of many Vorlons with telepathy and in the ensuing battle, the Vorlons forced the aliens back into their own dimension and sealed the portal. A group of Vorlons, still under the control of the Thirdspace aliens, captured the artifact and jettisoned it into hyperspace, hoping to recover it later. The aliens were trapped in their own dimension but they waited until the time when the gate would be found and opened again.

Straczynski later confided during an interview that the Thirdspace aliens were inspired by Lovecraft's Great Old Ones,{{citation needed|date=February 2012}} in that they are a malevolent force existing in a dimension or trans-spatial realm just adjacent to our own and that they use other species to increase their power and as servants.