Tetra Persei Two
From Tardis Wiki, the free Doctor Who reference
Tetra Persei Two was a planet on which the Ethereal took five thousand years to integrate the sentient population into itself.
The Ethereal built itself up as part of the society's hierarchical tradition. It became a part of the Forefathers' Edicts.
When the natives of Tetra Persei Two came into contact with a delegation from another world, the Edicts collapsed and the Ethereal was driven away. (PROSE: The Ethereal)
