The Master's TARDIS

The Master 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 Type 40 Mark II. (DW: Terror of the Autons) Unlike the Doctor's TARDIS, the Master's TARDIS has a fully functioning chameleon circuit.

Exterior

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

• 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)

On the planet Gallifrey it assumed the form of a grandfather clock (DW: The Deadly Assassin).

On the planet Traken he used one TARDIS to assume the form of the Melkur. Though this TARDIS was destroyed, he left in another TARDIS, again disguised 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 an brown ionic column. (DW: Logopolis) He would then tend to the ionic column as his TARDIS's "default" exterior. (DW: Castrovalva, Time-Flight, 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 (DW: The Ultimate Foe).

Interior

The Master's TARDIS has had a varied interior, his first TARDIS simply had a scanner (DW: Terror of the Autons), while 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 web (which he used to contain 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)