Zero Room

The Zero Room is an important room in the TARDIS.

The Zero Room is an atmospheric and calming room that used by the Time Lords in times of difficult regeneration. It is cut off from the rest of the universe.

The Zero Room was used by the fifth incarnation of The Doctor after his regeneration. The destruction of the Zero Room came when the TARDIS needed to eject part of its structure in order to boost itself out of danger. The part ejected was picked at random. However, it lived on, becoming a smaller capsule built by Nyssa. (DW: Castrovalva)