TARDIS Index File


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Type: Gallifreyan technology
Place of origin: Gallifrey
Memorable moment
The Editor gets the key to the TARDIS - Doctor Who - The Long Game - Series 1 - BBC02:44

The Editor gets the key to the TARDIS - Doctor Who - The Long Game - Series 1 - BBC

A TARDIS key was the key to the exterior door of a TARDIS. They could be found in a variety of shapes and designs. Whatever the key's shape and size, and whatever form the TARDIS' outer plasmic shell, the key would fit a lock somewhere in the structure.

Function Edit

Use of a TARDIS key enabled entry to a locked TARDIS in the manner of other types of keys, and was not limited by the reconfigurable shape of either the key itself or the outer plasmic shell of the TARDIS. Different TARDIS shells had different locks, whether obvious or hidden, and a TARDIS lock would accept its key even if it was physically larger than the lock. (PROSE: Interference - Book Two)

The barrier on the Doctor's TARDIS was a double curtain trimonic. As such, it utilised a cypher indent key. (TV: The Deadly Assassin). In its police box disguise, entry was allowed by inserting a key into the lock, just like a real police box. (TV: Doctor Who, Rose and others) However, the locking mechanism did not respond to police-issued keys, (TV: Blink) and would not even open when unauthorised persons used the Doctor's keys. [disputed statement] [source needed] According to Susan Foreman, the lock had a defence mechanism in which there were twenty one different holes inside the lock, one being the right place and other twenty being wrong. If a mistake was made, the whole inside of the lock would melt. (TV: "The Survivors") The Brigadier was prevented from opening the TARDIS in the Third Doctor's absence, because of the metabolism detector on the lock. (TV: Spearhead from Space) Nevertheless, there were occasions on which strangers were able to successfully use the Doctor's key, suggesting either a flaw in the metabolism detector or a choice on the part of the TARDIS. (TV: The War Machines, Doctor Who, Blink, HOMEVID: Shada)


The Eighth Doctor's TARDIS key and lock, the actual lock hidden behind the "Yale" lock. (TV: Doctor Who)

The lock could be manually secured from inside the TARDIS, preventing even authorised individuals from using the key to unlock the doors from the exterior. (TV: The Dalek Invasion of Earth, Utopia) At some point shortly before the Tenth Doctor's regeneration, the TARDIS had a system that allowed him to lock the TARDIS remotely using a fob (as a joke, the TARDIS roof light flashed and a alarm chirp sound was heard, similar to that used on vehicles on Earth). He was also able to open the door remotely. (TV: The End of Time)

There were occasions on which the Doctor or his companions needed to use the key to lock the doors, (TV: The Sensorites) while on others (TV: Spearhead from Space, The Christmas Invasion) the act of merely closing the doors locked the TARDIS. It was evident that the TARDIS' lock could be set to secure either automatically or manually.

However, a key was not always needed to open a TARDIS. During the Doctor's first encounter with River Song (from his point of view), she remarked that she had witnessed his future self open the doors of the TARDIS by snapping his fingers. The Doctor reacted with disbelief, but later successfully opened the doors in this fashion. (TV: Forest of the Dead) After regenerating into his eleventh self, the Eleventh Doctor again opened the TARDIS by snapping his fingers, demonstrating that this method had become a reliable way for him to do so. (TV: The Eleventh Hour) The Doctor did, however, continue to make regular use of his key to unlock the TARDIS. (TV: The Time of Angels, Flesh and Stone, et. al.)

The Doctor's TARDIS Key Edit

Design Edit


A copy of the TARDIS key TV: Planet of the Spiders)

The key to the Doctor's TARDIS took several forms.

The First [source needed] and Second Doctors [source needed] used a key which resembled a plain Earth Yale lock, such as might be used with a genuine police box. The Third Doctor started out with the same key. (TV: Spearhead from Space)

At some point in his third life, the Doctor began experimenting with new designs for his key, coming up with several alternative designs before settling on a spade-shaped silver key. After his regeneration, the Fourth Doctor experimented with even more radical designs, which included a double-helix apparently made of plastic, before eventually going back to the spade and Yale styles. (PROSE: Interference - Book Two) The Yale key was also used by the Fifth [source needed] and Sixth Doctors. [source needed]

The Seventh Doctor used yet another design, incorporating the Seal of Rassilon with a fan-shaped motif. (TV: Ghost Light) The Seventh Doctor eventually went back to the spade key, which the Eighth Doctor initially continued to use. (TV: Doctor Who) At some point, the Eighth Doctor returned to using the Yale key. (PROSE: The Crooked World, History 101)

The Ninth, (TV: Aliens of London, Father's Day) Tenth, (TV: 42) and Eleventh Doctors (TV: The Eleventh Hour) used Yale-type keys in a gold/brass colour as opposed to earlier Doctors' silver-coloured Yale keys.

Abilities Edit

Beyond simply unlocking the TARDIS doors, the Doctor's TARDIS key has often displayed other uses and characteristics.

Known copies Edit

Susans TARDIS key

Susan Foreman's abandoned TARDIS key (TV: The Dalek Invasion of Earth)

The Doctor usually had his TARDIS key on his person at any given time. There were numerous other known copies of his key including, but probably not limited to:

Other TARDIS Keys Edit

The Chancellery Guard on Gallifrey had cypher indent keys, which were TARDIS master keys of varying shapes under the control of the Castellan's office. Some of these worked by being inserted into the keyhole, some worked by simply being held near the lock. (TV: The Deadly Assassin, The Invasion of Time)

Behind the scenes Edit

  • The original spade-type TARDIS key was designed by Jon Pertwee and began use in Season 11. [1]
  • The Rassilon-style key was designed by Mike Tucker. [2]
  • The prop used for the TV movie was a BBC-licenced replica of the classic spade key, sold at the time by now-defunct American memorabilia catalogue 800-TREKKER. [3]
  • The 2005 key was a standard nightlatch key made by UK lock manufacturer ERA, and it was the real key to the working lock on the TARDIS prop. Spares were stored in a secret compartment inside the TARDIS prop. [4]

Footnotes Edit

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