Gallifrey
In the revived series (2005 onwards) Gallifrey was originally referred to as having been destroyed in the Time War, which was fought between the Time Lords and the Daleks. It was depicted in a flashback in "The Sound of Drums" (2007) and appeared prominently in "The End of Time" (2009–10). At the conclusion of "The Day of the Doctor" (2013) Gallifrey is revealed to have actually survived the Time War, though it was frozen in time and transported into a bubble dimension, which was revealed to have been situated at the end of the universe at a chronological point before "Hell Bent" (2015). By "Spyfall" (2020), it had been reduced to ruin by The Master. At the end of Ascension of the Cybermen it is revealed that Gallifrey is not in the bubble dimension; rather, it has been transported behind a wormhole, referred to as 'The Boundary'.
Gallifrey-3