TARDIS

The TARDIS is a fictional time machine featured in the Doctor Who television franchise. The name is actually an acronym, which stands for Time and Relative Dimension in Space. It is the principal means of transportation for the Time Lord known only as the Doctor, who often brings various companions, many of whom are Earthlings along with him on his journeys across time and space. The ship used by the Doctor is a Type 40/Mark I TARDIS. The TARDIS was first seen in the pilot episode of the series "An Unearthly Child", directed by Waris Hussein and written by Anthony Coburn.

A TARDIS may assume different shapes and physical designs. The one used by the Doctor is camoflaged as a police call box from the year 1963. The Eleventh Doctor once explained the process that governs its design as, "It's camouflaged. It’s disguised as a police telephone box from 1963. Every time the TARDIS materializes in a new location, within the first nanosecond of landing, it analyses its surroundings, calculates a twelve-dimensional data map of everything within a thousand-mile radius, and then determines which outer shell would best blend in with the environment. And then it disguises itself as a police telephone box from 1963." ("The Eleventh Hour")

Notes & Trivia

 * Also referred to as a TT capsule. Sometimes just simply referred to as "the ship" as well.