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The TARDIS is a time machine and spacecraft in the British science fiction television programme Doctor Who and its associated spin-offs
A TARDIS is a product of the advanced technology of the Time Lords, an extraterrestrial civilisation to which the programme's central character, the Doctor, belongs.
It came from Gallifrey, his home planet. (TARDIS stands for Time And Relative Dimension In Space)
It can travel to any point in all of time and space and is bigger on the inside than the outside due to trans-dimensional engineering – a key Time Lord discovery.
At some stage during his travels across the galaxy the cloaking device got stuck and the TARDIS has retained the outward appearance of an old fashioned British Police Box.
Many actors have played Dr Who and from time to time he has to regenerate.
During this period he takes on a new appearance and a completely different persona.
His travelling companions also change from time to time but they are mere mortals.
The Doctor of course is a Time Lord (with two hearts)
youtube has many episodes of Dr.Who.
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