Outer Hebrides

Gravonax Island was located in the Outer Hebrides. (AUDIO: Night Thoughts)

As related to Petronella Osgood by Jo Grant, she and the Third Doctor had found Ogrons marooned in the Outer Hebrides. Osgood, despite thorough following of their escapades recorded in UNIT files, was curiously unaware of this encounter. (AUDIO: United)