At the Fall of Gallifrey, the Doctor's first life cycle flew their TARDISes into Gallifrey's lower atmosphere so that they could shunt the planet into a pocket universe. (TV: The Day of the Doctor)
At the Fall of Gallifrey, the Doctor's first life cycle flew their TARDISes into Gallifrey's lower atmosphere so that they could shunt the planet into a pocket universe. (TV: The Day of the Doctor)