All TARDISes from the Type 28 onwards have a Zero Room. The insulated walls of the Zero Room completely cut it off from the outside universe. It is, in fact, a pocket universe within a TARDIS's Micro-Universe. The Zero room entrance is located on the lower levels, near the heart of the TARDIS. The room smells like roses and has a calming effect on all life forms. Even gravity is local and can be subconsciously controlled, allowing anyone to levitate comfortably.
Inside the Zero Room healing granites with regenerative cells can heal many types of wounds including deafness from having one's ears boxed. However the healing only begins once the patient has fallen asleep. Skin wounds can be repaired in a matter of minutes and most other physical wounds can be healed in few hours if the subject can remain alive long enough. The regenerative cells use chemicals to heal burns and the granites can neutralize many types of poison. If an emergency is expected a TARDIS can be flooded with healing granites, which will begin providing aid instantly. In such a case the granites would work with the Temporal Grace Circuits.
Zero Rooms are also used by Gallifeyans to recover from difficult regenerations. A TARDIS can also supply Artron Energy to help an ailing Time Lord. Zero cabinets can act as stasis chambers for Time Lords.
Zero Rooms probably use bio-electronics. A properly sealed Zero Room uses strong force interaction to fuse the internal interfaces together. This gives it better invulnerability then the exterior of a TARDIS and make it immune to Tissue Compression Eliminators. It should be noted that Zero Rooms are balanced to zero energy, and thus don't appear on the Architectural Configuration Indicators. It takes several months for a TARDIS to produce a new Zero Room if the original one is lost.
The following color code is used:
- Black: For information from the TV Series, including Dimensions in Time, and 1996 TV Movie.
- Blue: For information from the Novels and Audios including Target, Virgin, BCC, and Big Finish.
- Green: For information from 'licensed' reference sources such as the Technical Manual, Doctor Who Magazine, and the Role Playing Games.
- Red: For information from unofficial sources -The Faction Paradox series, behind the scenes interviews, author's speculation, and popular fan belief.
The TARDIS Technical Index is copyright Will B Swift.