Page "TARDIS" Paragraph 22

A TARDIS usually travels by dematerialising in one spot, traversing the time vortex, and then rematerialising at its destination, without physically travelling through the intervening space.

However, the Doctor's TARDIS has been seen to be able to fly through physical space, first in " Fury from the Deep " ( 1968 ) and at repeated times throughout the revived series, most notably in " The Runaway Bride " ( 2006 ), in which the TARDIS is shown launching into space ( most previous incidents show the TARDIS flying only after it has dematerialised from a location ).

In " The Runaway Bride ", extended flight of this nature puts a strain on the TARDIS's systems.

While a TARDIS can materialise inside another, if both TARDISes occupy exactly the same space and time, a Time Ram will occur, resulting in their mutual annihilation (" The Time Monster ").

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.

In the mini-episodes " Space " and " Time " ( 2011 ), an accident results in the TARDIS automatically materializing in " the safest spot available ," which turns out to be inside its own control room.

The Eleventh Doctor describes this as " worse than a time loop-a space loop.

Nothing can enter or leave this ship ever again.

" However, a version of Amy Pond from seconds in the future appears as soon as he says this allowing him to rectify the problem.