What does 'TARDIS' stand for on Doctor Who? And how come its interior is always changing while its exterior remains the same?

Doctor Who reveals a new opening title sequence and TARDIS interior to usher in the show's vibrant and exciting new era.

Suddenly the room was warmer and more inviting, yet still retained that colder, metallic, scientific feel, which suited the Twelfth Doctor’s ever-changing and unpredictable personality.

While it's apparent the Doctor can fly the TARDIS (within reason), there are other Doctor Who characters who can pilot the iconic ship.

To complement Peter Capaldi's more brooding Doctor, the Twelfth Doctor's TARDIS wasn't quite as bright and inviting as his predecessor's. The lights were turned down low, and the brilliant blue of ...

And, although he redecorated by adding bookcases and chalkboards, the 12th Doctor essentially kept the same TARDIS interior the 11th Doctor had had starting with “The Snowmen” in 2012.

The 12th Doctor had an eclectic abode, and its bright aesthetic was easy to fall for. Now, the TARDIS has taken on a darker interior, and it suits the 13th Doctor just right.

When newcomer Jodie Whittaker enters the TARDIS as the 13th Doctor on Doctor Who, her blue time travel box will get an all-new makeover. Or perhaps more accurately, its exterior will revert to a ...

The TARDIS has changed its form many times. Here's our rankings of every Doctor Who TARDIS interior ranked from worst to best.

This beautiful crystal TARDIS is a fine send-off for Peter Capaldi's Doctor The 12th Doctor, frozen in (crystal) time.

The official Doctor Who account posted a time lapse video of the crew taking apart the old TARDIS interior, the one that belonged to the departing 12th Doctor, and removing it from the soundstage ...