The Keskan Collective was the ruling body of the Keskans on Keska. One member of the collective was Rejoice's father, Thran. (AUDIO: The Innocent [+]Loading...["The Innocent (audio story)"])
The Keskan Collective fell when the Taalyens invaded the planet together with the Daleks and enslaved the Keskans. They were drilling on the planet's core to destroy Gallifrey. (AUDIO: The Heart of the Battle [+]Loading...["The Heart of the Battle (audio story)"])