The Master's TARDIS



The Master's TARDIS is the TARDIS of the renegade Time Lord, The Master, who appears to have had several different TARDISes throughout his engagements with the Doctor.

During his Earth-based vendetta against the Doctor and UNIT, the Master used a TARDIS with a Mark II dematerialisation circuit. (DW: Terror of the Autons) Unlike the Doctor's TARDIS, the Master's TARDIS had a fully functioning chameleon circuit.

Exterior
During his early rivalry with the Doctor, the Master changed his TARDIS into several different forms:

On Traken, the Master disguised his ship as the Melkur. In this form, the TARDIS was mobile and it could fire sonic attacks. When this TARDIS was destroyed, he fled in another TARDIS, again disguised as a grandfather clock. (DW: The Keeper of Traken)
 * A horsebox (DW: Terror of the Autons)
 * A white door (DW: The Claws of Axos)
 * A spaceship (while he posed as an Adjudicator) (DW: Colony in Space)
 * A computer bank (DW: The Time Monster)
 * The Melkur (DW: The Keeper of Traken)
 * A Grandfather Clock (DW: The Keeper of Traken)

While preparing a trap for the Doctor, the Master temporarily changed his ship into a police box, then later hid it inside the Cloister room disguised as tree and finally as a brown ionic column. (DW: Logopolis) He would then tend to the doric column as his TARDIS's "default" exterior. (DW:  Castrovalva, Time-Flight,or a 3 sided Stone Column in (Planet of Fire)

He would, though, configure the TARDIS into the Speedbird Concorde 192 (DW: Time-Flight), and later an iron maiden (DW: The King's Demons) and, within the Matrix, a wooden shack and a statue of Queen Victoria (DW: The Ultimate Foe).

Interior
The Master's TARDIS has had a varied interior. In its first appearance on-screen in (DW: Terror of the Autons), we only see the scanner. Later interiors seems to mimic the Doctor's re-designs of his own TARDIS. (DW: The Time Monster)

Much of the time it is simply a sombre black version of the interior of the Doctor's TARDIS, sometimes with specialist equipment such as the Hadron web which he used to hold Adric. (DW: Castrovalva)

Specific Systems
Once, the Master tricked the Doctor into materializing his TARDIS around the Master's, creating a dimensionally recursive loop (DW: Logopolis) - repeating a situation that had previously occurred accidentally. (DW: The Time Monster)