After the Midnight Entity's terrible victory over Dr. Who and his irritating passenger pals, it was spurred to spread its demonic invisible tendrils across all of time and space. In the year 3 billion and 6, a later incarnation of the Doctor would discover it had set up an entire galactic company of hypnotic mind-controllers to bring about the breakdown of all communication into endless screams of "STOP IT! JUST STOP IT! MAKE HER STOP IT!" followed shortly by suicide.
It was said that the 'repetition' function of the Entity had by this point metastasized and metamorphosised. Members of the company at this point could be known to spend hours, late at night - even past midnight - sat at a computer, doing the same thing, over, and over, and over.