Grahv
From Tardis Wiki, the free Doctor Who reference
Grahv was the home planet of the Grahvians. During the Last Great Time War it was attacked by the Daleks, who built a base in the Grallian Hills.
The Time Lords placed it in a time lock. (AUDIO: The War Valeyard)
The Eighth Doctor mentioned the Valeyard's planet as a place, like the Gulf of Ithon, where the walls of reality were weak. (AUDIO: Restoration of the Daleks)
