The Doctor's TARDIS is stuck as a police box. Has that always been so? Specifically:

  • has it had that shape right from the start
  • has it appeared as a police box in every episode?

8 Answers 8


Technically not always, in "An Unearthly Child" we are introduced to the TARDIS and it appears it is the first time the chameleon circuit has failed. The Doctor says:

It's still a police box. Why hasn't it changed? Dear, dear, how very disturbing.

This establishes that the TARDIS is now stuck as a police box, but Susan reveals that it wasn't always a police box:

SUSAN: It should have changed. Wonder why it hasn't happened this time.
BARBARA: The ship, you mean?
SUSAN: Yes, it's been an Ionic column and a sedan chair.
BARBARA: Disguising itself wherever it goes.
SUSAN: Yes, that's right. But it hasn't happened this time. I wonder why not.

In the "Attack of the Cybermen" serial, the TARDIS changes several times after the Doctor attempts to fix the chameleon circuit. First into an ornamental dresser, as outlined in the script below:

DOCTOR: This looks familiar.
PERI: Where are we?
DOCTOR: Scrap yard.
PERI: I didn't mean that. I meant, whereabouts on Earth are we?
DOCTOR: London.
PERI: It didn't change.
PERI: I thought you said it was going to blend into its surroundings.
DOCTOR: Oh, she's probably thinking about it. Come on, let's find out where those signals are coming from.
(The Tardis changes into a highly ornamented dresser.)
PERI: Oh, neat, Doctor.
PERI: Very neat. I mean, there's nothing at all incongruous about that.
DOCTOR: Well, she hasn't done it for a long time. She's out of practice.
PERI: Of course, Doctor.

Here is the TARDIS shown in mid-transformation and as the final dresser. The Doctor, Peri, and Dresser TARDIS

Later it transforms into a pipe organ (as pictured) and the Doctor plays it briefly.

(The Tardis materialises in Lytton's junk yard as a small pedal pipe organ.)
DOCTOR: This is getting ridiculous.
PERI: I'm not saying a word.
DOCTOR: I was certain I'd fixed it.
(He pulls out a stop and plays the opening line from JS Bach's Toccata and Fugue in B Minor.)


And lastly it turns into a gate.

(A pair of large wrought iron gates, the sort you'd find at the entrance to the driveway of a very large house, materialise in a corridor. The Cybermen lead their captives out.)
GRIFFITHS: What happened to the organ?
PERI: Do you really want to know? Oh, this place is so cold!

The TARDIS is also shown undisguised in "The Name of the Doctor" silver-grey cylinder. Undisguised TARDIS

This varies slightly from the undisguised TARDISes shown in "The War Games" serial. Undisguised TARDIS old

  • 1
    I am currently making my way through the classic serials, and I will update this post if I missed any transformations.
    – Matt
    Dec 19, 2013 at 15:27
  • I remember reading in a Dr Who museum exhibition that they came up with this plot device because they didn't have the budget to keep changing its appearance from one week to the next.
    – Darren
    Aug 7, 2017 at 10:23

The TARDIS has appeared as a police box since the first Doctor.

The Sixth Doctor made some progress towards fixing the chameleon circuit briefly, but the forms chosen did not blend in to the surroundings very well, and eventually he reverted it to the police box form.

There was also an audio short story entitled The Deep which dealt with Nyssa attempting to fix the chameleon circuit, and succeeding insofar as the TARDIS then took on the form of a whale, both inside and out. The Doctor undid Nyssa's repairs in order to make the TARDIS operable.

  • 2
    The 4th Doctor episode Logopolis deals extensively with the chameleon circuit; Four claims he stole his TARDIS from the repair shop in the midst of a chameleon circuit replacement.
    – KutuluMike
    Oct 24, 2012 at 21:28

The TARDIS has been "stuck" as a police box since the very first episode - where it made sense, as the Doctor was hiding out on Earth and it was inside a junkyard.

There was only one story, during the Colin Baker era (Attack of the Cybermen), when he temporarily repaired the circuit. It still didn't work very well, and at the end he disabled it again as he'd become attached to the police box shape.

  • 2
    In the first episode, after it has travelled from the junkyard to the prehistoric valley, the Doctor acts surprised that it hasn't changed shape.
    – Mr Lister
    Feb 15, 2013 at 13:21
  • 1
    However, in The Name of the Doctor when Clara goes into the Doctor's time stream it shows him stealing the Tardis, and at the time it was not a police box. So I think we can assume it broke some time after he stole it, but before the first episode of the show.
    – childcat15
    Oct 17, 2013 at 17:07

No not always, I've seen shows in the original series (before the renewed cannon of 2000's) where the doctor's TARDIS changed into several other objects in attempt to blend in.

Frankly the objects the circuit always chose did not always blend-in probably.

Eventually I think the Doctor got sick of it and it officially "broke" into the lovely blue box we all now. The doctor also said he never bothered to get it fixed because he loved the blue box when rose first asked about it in the newer series.


There are a number of episodes since 1963 that address the TARDIS' look. whilst it was almost always a police box, the TARDIS has been shown as other objects such as in the recent episode showing the Doctor stealing it from Gallifrey looking like a silver cylinder, and I can remember another classic episode where the doctor changed it into an old clock or oven or something to blend in with a rubbish tip after briefly fixing the circuit. However the TARDIS only changed shape after landing and the doctor exiting, which then lead to him taking a while to actually find the door when he got back, i think this was one of the reasons he kept it a police box as well as getting attached. and for BBC to market the spacecraft as merchandise (you can't market something that changes every episode!) The Master's TARDIS is also seen on various occasions as other objects such as a grandfather clock, as well as the Rani's TARDIS - both of which are completely different inside and out compared to each other and the Doctor's. It did appear in the first episode as a police box and i believe it certainly will in the last :(


The Doctor slightly addresses it in The Caves of Doom, but then, it’s not fully addressed until the story The Meddling Monk where it is called the camouflage unit. Later, in Logopolis the doctor first called it a chameleon circuit and also stated it was in repairs when he got it.

Also, the doctor’s TARDIS was old when he got it and although newer TARDISes have a switch under the console that pops a keyboard out that the pilot can enter a code to make it appear as anything they want, the older models use scanners to try and blend in and they broke easily. It has been referenced many times in the canon show and in comics and audio adventures things the TARDIS had become before the events of An Unearthly Child where it didn’t change for the first time.

The Doctor has attempted to fix it multiple times like in Attack of the Cyberman, and audio adventure where Nyssa tried and turned the TARDIS into a whale, the seventh doctor using his TARDIS in another timeline where he died in his third body and his chameleon circuit in PROSE. In an Eleventh doctor deliberately went back and destroyed the chameleon circuit in the comic Hunters of the Burning Stone. You can read more about it on the wiki.


There has been different theories on this. I've heard that the circuit works but still chooses to be a police box. Too the circuit is still broken, and the doctor gave up on trying to fix it. Though Doctor/Donna knew how to fix the circuit but never got around to fix it.

  • 6
    Can you provide a source for that theory? Is it your own?
    – bitmask
    Sep 24, 2012 at 9:39
  • The Doctor says so in Boom Town, I think. The chameleon circuit is broken as in it re disguises itself everytime, but just settles on a police box. This "explains" why the police box sometimes changes between seasons/series. And in Journey's End, Doctor/Donna mentions to the Doctor that he easily can fix the circuit.
    – AkselK
    Jan 25, 2013 at 10:23
  • (Actually, it's in Meanwhile in the TARDIS miniepisodes)
    – AkselK
    Jan 25, 2013 at 11:18

I would say that the circuit does work but the TARDIS chooses to be a police box. If it didn't work then the outside would look identical to what it did in 1963 but there have been a number of changes in size, design and the shade of blue.

  • 2
    There is almost certainly out of universe reasons for these slight changes to it's appearance.
    – TheLethalCarrot
    Oct 11, 2018 at 11:01

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