" In " The Parting of the Ways ", the Doctor mentions that when Emergency Program One was activated, the sonic screwdriver would receive a signal from the TARDIS.

The Doctor's TARDIS was for most of the franchise's history said to have been stolen from the Time Lords ' home planet, Gallifrey, where it was old, decommissioned and derelict ( and, in fact, in a museum ).

Also in " The Doctor's Wife ", the TARDIS reveals that much of this " unpredictability " was actually intentional on her part in order to get the Doctor " where needed to go " as opposed to where he " wanted to go ".

In " The Empty Child " ( 2005 ), the Doctor stated that the telephone is not connected to a telephone line, and in Logopolis ( 1981 ), the Master materialised his TARDIS around a normal police box while a police officer was using the telephone, causing the line to go dead.

The type of police box that the TARDIS resembled was constructed of concrete.

This was referenced on-screen in the episode " Blink " ( 2007 ), when the character Detective Inspector Shipton says the TARDIS " isn't a real box.

The Doctor attempts to repair the circuit in " Logopolis " and " Attack of the Cybermen ", but the successful transformation of the TARDIS into the shapes of a pipe organ, a painted Welsh dresser ( much to the amusement of Perpurgilliam " Peri " Brown and the Sixth Doctor's annoyance ) and an elaborate gateway in the latter serial was followed by a return to the police box shape.

In " Utopia " ( 2007 ), and in " The Dalek Invasion of Earth " ( 1964 ), the TARDIS was shown to have an internal deadlock ; once thrown, it would prevent entry even for authorised users with authorised keys.

In " The Sensorites " ( 1964 ), the entire lock mechanism was removed from the TARDIS door via a hand-held Sensorite device.

In " Utopia ", the Doctor was able to lock the TARDIS to the coordinates it had previously visited from outside using the sonic screwdriver.

" Utopia " presented, for the first time on-screen, a circumstance in which a character travels on the exterior of the TARDIS during a flight, when Jack Harkness was somehow able to grab hold of the TARDIS as it began to dematerialise and hold on to its destination ; the episode does establish, however, that a normal person would not have survived the trip, as Harkness is " killed " by the experience, but due to his immortality, soon revives.

In the Seventh Doctor audio drama " Colditz ," a character was killed by being halfway inside the TARDIS when it dematerialised.

However, this trick was used in turn by the Empress of the Racnoss, which pulled the TARDIS from the creation of the Earth to only a few minutes after its initial departure.

In " Frontios " ( 1984 ), when the TARDIS was destroyed in a Tractator-induced meteor storm, the interior ended up outside the police box shell with various bits embedded in the surrounding rock.

The Doctor attempted to use the TARDIS key in conjunction with a small electrical charge to recover the ship, but the process was interrupted and the TARDIS was only restored after the paradox was resolved.

With the approval of his widow, Ingeborg, his voice was utilised as part of the plot of the Big Finish Productions ' 40th Anniversary Doctor Who audio drama, Zagreus, appearing as messages from the Doctor's TARDIS as it attempted to help the currently corrupted Eighth Doctor ( voiced by Paul McGann ).

The most famous of the Workshop's creations using ' radiophonic ' techniques include the Doctor Who theme music, which Delia Derbyshire created using a plucked string, 12 oscillators and a lot of tape manipulation ; and the sound of the TARDIS ( the Doctor's time machine ) materialising and dematerialising, which was created by Brian Hodgson running his keys along the rusty bass strings of a broken piano, with the recording slowed down to make an even lower sound.

The Doctor and Susan had already been travelling for an unspecified amount of time, before they decide to settle in London to make repairs on the TARDIS ; Susan states that she and her grandfather have been in London for five months.

The Doctor already knows Iris as an " old friend ", and she is seen to be travelling in a 20th century London Routemaster double-decker bus ( the No. 22 to Putney Common ), which is, in reality, her TARDIS.

* In the Eighth Doctor Adventures novels published by the BBC, the Eighth Doctor learns that he has been infected by the Faction Paradox biodata virus in his third incarnation and will eventually become one of the Faction, prompting him to take action to find a way to cure himself ; even when the future version of himself that will result from his infection appears, the knowledge that he was infected inspired the Doctor to start work on finding a cure, learning that his TARDIS had already taken action to help him.

* The word was featured in the Doctor Who episode " The Doctor's Wife " ( written by Neil Gaiman ), as part of a telepathic password to enter one of the TARDIS ' old control rooms.

As the penniless Vorg tries to get enough credit bars to return home by using the old three-magum-pods-and-a-yarrow-seed trick, the two travellers depart in the TARDIS.

As the TARDIS vanishes, Tegan runs back, remembering the Doctor's old admonishment: " Brave heart, Tegan.

When the Doctor emerges from within the TARDIS, Achilles believes him to be the god Zeus disguised as an old beggar, and insists he accompany him to the Greek encampment.

It would be the latter encounter that would see the Doctor first regenerate ; stating " This old body of mine's wearing a bit thin ," he collapsed at the end of the serial, regenerating inside the TARDIS into the Second Doctor.

After further adventures in which the Doctor re-encountered old foes, including the Silurians and the Sea Devils, both Tegan and Turlough left the TARDIS.

The Fifth Doctor gives Erimem her first tour of the TARDIS interiors, but things start to go strangely wrong with the ship, leading to the return of an old ally.

In " The Parting of the Ways " and " Utopia " it is used to operate the TARDIS controls remotely ; when the Doctor attempts to counteract the Master's theft of the TARDIS, it is used to limit the TARDIS ' destination.

In the " Series Three concept Artwork Gallery ", when referring to the burnt out sonic screwdriver, Peter McKinstry says " the green crystal structure visible under the shattered dome refers back to the TARDIS console crystal.

In The Infinity Doctors, the Doctor negotiated a peace between the Sontarans and the Rutan Host when two of them were left trapped in a TARDIS for several hours and got to talking due to their inability to kill each other.

" This does not apply when facing certain extremely advanced weaponry, often created after the Doctor's Type 40 TARDIS, such as Dalek missiles (" The Parting of the Ways "), for which the TARDIS requires additional shielding.

In the program, the Doctor's TARDIS is an obsolete " Type 40 TT capsule " that he unofficially " borrowed " when he departed his home planet of Gallifrey.

Although a TARDIS is supposed to blend inconspicuously into whatever environment it turns up in, the Doctor's TARDIS retains the shape of a police box because of a systems fault which occurred in the first Doctor Who episode, " An Unearthly Child ," when the TARDIS landed in London in 1963.

In " The Invasion of Time ," a Citadel Guard on Gallifrey is initially baffled by the archaic lock when attempting to open the Doctor's TARDIS.

The revived series uses the Yale key version, most notably shown in " Blink " ( 2007 ), when the Weeping Angels attempt to gain access to the TARDIS using a stolen key.

In " Doomsday ", when the TARDIS is confiscated, the Doctor claims, " You'll never get inside it.

The Eleventh Doctor also does this at the end of " The Eleventh Hour ", when revealing the newly regenerated TARDIS interior to Amy Pond ; he then does it again in " Day of the Moon ".

Later in the same episode, the key fob, when again used by the Doctor, shifts the TARDIS " just a second out of sync " ( one second into the future ), rendering it invisible and so hiding it from the Master.

The pair are admiring the TARDIS, thinking it to be a piece of art, when the Doctor ( Tom Baker ), Romana ( Lalla Ward ) and Duggan ( Tom Chadbon ) rush into it and it dematerialises.

While there, the two encountered the Daleks, and the Doctor stole the directional unit from the Monk's TARDIS ( later destroying it when he tried to use it in his own ship, as it was incompatible ), causing the Monk to lose control over his TARDIS's navigation.

In September 2010, MIT students attempted to put a TARDIS, the time machine from the BBC's Doctor Who, onto a roof.

" Up Above the Gods " (# 227 ), a vignette following up on this, features the Sixth Doctor and Davros having a conversation in the TARDIS.

Saward had written out the sonic screwdriver, believing that the Doctor had " a cupboard full of them " in the TARDIS.

The Doctor later receives a new one, which emerges from the newly-regenerated TARDIS console.

The TARDIS ( ( Time and Relative Dimension in Space ) is a time machine and spacecraft in the British science fiction television program Doctor Who and its associated spin-offs.

A TARDIS is a product of the advanced technology of the Time Lords, an extraterrestrial civilization to which the program's central character, the Doctor, belongs.

In the series, the Doctor pilots an unreliable, obsolete TT Type 40, Mark 3 TARDIS.

Although " TARDIS " is a type of craft rather than a specific one, the Doctor's TARDIS is usually referred to as " the " TARDIS or, in some of the earlier serials, just as " the ship ", " the blue box ", " the capsule " or even " the police box " and with the new Doctor " Sexy ".

Doctor Who has become so much a part of British popular culture that not only has the shape of the police box become more immediately associated with the TARDIS than with its real-world inspiration, the term " TARDIS-like " has been used to describe anything that seems to be bigger on the inside than on the outside.

The Ninth Doctor explains that if, for example, a TARDIS ( with a working chameleon circuit ) were to materialise in ancient Rome it might disguise itself as a statue on a plinth.

In the 2006 Christmas special, " The Runaway Bride ", the Doctor remarks that for a spaceship, the TARDIS does remarkably little flying.

In " Logopolis ", the Master tricked the Doctor into materialising his TARDIS around the Master's, creating a dimensionally recursive loop, each TARDIS appearing inside the other's console room.

The Doctor implies in this serial, with his protestations of being " bugged ", that the TARDIS is not normally connected to the Matrix in this manner.

The TARDIS has been shown to be incredibly rugged, withstanding gunfire ( the 1996 television movie, Doctor Who ; " The Runaway Bride "), temperatures of 3000 degrees without even scorching (" Forty-Two "), atmospheric re-entry (" Voyage of the Damned "), falls of several miles (" The Satan Pit ") and sinking into pooling acid ( The Almost People ).

In " The Curse of Peladon ," after the TARDIS falls down the side of a cliff, the Third Doctor remarks that it " may have its faults, but it is indestructible.