The Thirteenth Doctor

The clock has struck thirteen. The Twelfth Doctor is regenerating. And filling his own shoes is an unexpected face. But with the new face, comes a new foe. The Valeyard is released, attempting to destroy his own home of Gallifrey with the help of the Daleks. In a panic, Thirteen calls back three of his past selfs (Tenth, Fourth, and Second) to help him defeat the Valeyard and save Gallifrey once again.