Here's some interesting info from the BBC: The original TARDIS was allegedly borrowed from the BBC series 'Dixon of Dock Green' and used (with many different paint jobs and refinements) right up to the Tom Baker story 'The Seeds of Doom'. After many years of abuse it fell apart, nearly injuring Elizabeth Sladen. The second was commisioned and used to the end of season 17, and the third box was used from Season 18 until the end of season 22. 'The Trial of a Timelord' saw the fourth incarnation which lasted right to the end of the series in 1989. The BBC made several replicas over the years for promotional use, one of which can often be seen in sitting quietly in a prop store at Television Centre. There have been several different versions of the Doctor's console room. The original version was used up to and including 'Pyramids of Mars' (with the exception of a slightly different set used in 'The Time Monster' which proved unpopular and was not used again). The console itself was only used up until 'Inferno' when the Doctor removed it from the TARDIS, trying to avoid blocks on his movement imposed by the Time Lords. 'The Claws of Axos' saw a new console, used until halfway through Tom Baker's time as the Doctor. A wooden, Jules Verne-style console room was used in Season 14. This was not re-used for the following season after it became badly damaged in storage. The old console room was used once again until 'The King's Demons', by which time the console had become battered beyond repair. A new console was commissioned for 'The Five Doctors' and this was used until the show's cancellation. Finally, of course, there was the spectacularly Gothic affair that featured in the TV Movie. However, a recent rumour alleges special effects designers have been spotted measuring police boxes... but sadly it is just a rumour.