Over the years the TARDIS interior has changed, sometimes only slightly. The original interior only had 1 level and was lighter inside. The layout remained the same throughout the classic series. The only major change was on season 14.
The last 3 versions of the TARDIS have been a lot darker and bigger than the original design.
The original TARDIS interior was shown in the very first story “An Unearthly Child” it made its last appearance in “The War Games”.
The set originally featured a big computer at the back, the fault locator. A few different side rooms were shown during the years including a bed room and a sitting room.
The TARDIS console appeared on its own in 3 stories, “The Ambassadors of Death”, “Inferno” and “Day of the Daleks”.
The original TARDIS console room came back in season 8. “Colony in Space” is the first time Jo has seen the interior of the TARDIS.
The original set was used from the 60′s even the wallpaper reappeared in some shots.
Pictures below are from “The Claws of Axos”, “Colony in Space” and “The Time Monster”.
The TARDIS console room was completely altered for one story, “The Time Monster” the basic look was still the same, the major difference being the new roundels. The set was said to be damaged and that’s why it only appeared the once.
For the tenth season the TARDIS console was brough back to its original look with a few extras such as the pull out bed shown in “Planet of the Daleks”.
A more basic TARDIS console room was used in season 11 and only appeared in a few shots.
A newer set was created for season 13 replacing the wallpaper with solid walls and the door leading to the other rooms appearing deeper.
What is referred to as the secondary Control room featured in season 14. It was a complete contrast to the original white control room. There appeared to be no central column acting as the time rotar and not as many controls compared to the primary control room.
In “The Invisible Enemy” the original white console room was reintroduced with a new set.
This set was the first to feature columns between the walls.
For the 20th anniversary special a new set was built bringing the console look up to date. The change still kept the classic design of the console room.
The 1996 console room was probablty the largest in size, the console room also had a living space and other areas. The console shape remained the same as the previous versions. This set was the darkest, a complete contast to what viewers had been used to.
The 2005 console room was made to look more organic. It was larger than the original console room. Like the 1996 version the this console room also adopted a darker theme. No door was seen leading to other rooms although references were made to one.
The 2010 interior was a similar colour scheme to the previous version. It has various stairs leading to the different rooms in the TARDIS, the console room has 3 levels.
This console room was introduced in the 2012 Christmas special – The Snowmen, half way through Series 7. The new TARDIS interior was part of a number of changes leading up to the 50th Anniversary.