Red

"Red" is the nickname of the BOOTH or the DARSIT, an X-7 Dimensionizer aboard which the Inspector spent most of his lives traveling through space and time in the company of associates.

Physical appearance
Red appears as a red phonebooth on the outside, and is easily confused for one. On the inside, however, and although it is in no way bigger on the inside than on the outside, she reveals her true nature as an advanced spacetime machine via a ludicrously complicated control panel where the telephone should be. (WC: The Inspector Chronicles Prequel) When materialising in a new point of Space and Time, Red would sometimes emit a pulsing green glow, (TV: Biology 101) and other times appear as shimmering lines, instead. (WC: Boyish the Extraordinary)

Personality
Though treated by the Inspector as a loyal companion, the BOOTH can be a fairly tetchy, temperamental device; Red's interface is fairly literal-minded about taking instructions, and whether that is sheer failure of A.I. design or intentional passive-aggressiveness is very much up for discussion. (WC: Boyish the Extraordinary)

Travels with the Inspector
"Red" has been the vessel for most of the Inspector's travels through Space and Time. She had a tendency of taking her humanoid occupants to places of whose nature they remained unaware until they stepped out of the ship, prompting the Insepctor to make the question of "when we are" a bit of a catchphrase of his. (TV: Biology 101)