The Absolute

The Absolute was a being that tried to alter the perspective of history.

Biography
The Absolute was unable to understand the various versions of history that existed because of perspective. It made numerous attempts to possess humans so that it could see history from this point of view. It attempted this upon Miquel Domínguez, who died in the process, then upon George Orwell where it was more successful, separating his conscience from his body. The consciences of those possessed held conflicting accounts of historical events and so the Absolute expelled them and they formed a separate creature. Unable to decipher a correct version of history, the Absolute was driven insane.

The Absolute attempted to remove all perspective from history so that it could just be one string of events. This allowed time travellers to see different perspectives upon events all at once.

The Eighth Doctor was one of the few able to see the Absolute. He chased it for some time and managed to collide it was the conscience entity. This restored history to its usual self. (EDA: History 101)