Board Thread:The Reference Desk/@comment-69.157.6.243-20151225191050/@comment-188432-20170601042307

Well, the implication of TEOD part 1 is that it has to do with Gallifrey, the Master and the Time Lords returning.
 * Doctor: Something's accelerating your species way beyond normal.
 * Ood Sigma: And the mind of the Ood is troubled.
 * Doctor: Why? What's happened?
 * Sigma: Every night, Doctor. Every night we have bad dreams.
 * cut to:
 * Elder Ood: Returning, returning, returning, it is slowly returning. Through the dark and the fire and the blood, always returning. Returning to this world. It is returning and he is returning and they are returning, but too late, too late, far too late, he has come.
 * Then the Doctor joins their collective dream, and it's about the Master laughing and the history of the Simm Master from the end of S3.


 * Then the Elder Ood specifically says:


 * Elder Ood: The Ood have gained this power to see through time because time is bleeding. Shapes of things once lost are moving through the veil. And these events from years ago threaten to destroy this future. And the present and the past.

So basically the Ood's rapid development is because of the Master/Gallifrey/Time Lords returning. It is a herald of, as the Elder Ood says, "the end of time itself".