Transmat — short for particle matter transmission (TV: The Armageddon Factor) — was a common technological form of instantaneous transport and many forms and designs existed throughout the universe. It was designed for matter transference: (PROSE: Engines of War) indeed it was a subset of methodologies described as teleportation.
Time Lords claimed to have "transcended" such technology when the universe was less than half its size and they were able to intercept transmat beams without harming anyone using them. At the time, the Fourth Doctor was charged to avert the creation of the Daleks. (TV: Genesis of the Daleks) It was still used to travel to the Death Zone on Gallifrey. (TV: The Five Doctors, PROSE: Engines of War)
In 1947, the Thirteenth Doctor encountered Thijarian transmat technology. Using their own transmat locks, the Doctor was able to create a transmat barrier to block them out. (TV: Demons of the Punjab)
In 2010, Mister Dread saved the Earth from destruction by using a transmat device to move a Veil starship into space. The Men in Black also used transmat devices to move objects into their vault. (TV: The Vault of Secrets)
By the mid 21st century, a T-Mat network was established on Earth and hacked by the Ice Warriors to invade the planet, in vain. At the time of the attack, T-Mat was monitored and controlled from the moon and distributed people and supplies, and the use of this faster than light technology meant other forms of transport were deemed obsolete. (TV: The Seeds of Death)
After the end of the Cyber-Wars, it was used by humans on the space station Nerva Beacon (TV: Revenge of the Cybermen), by a civilisation on the planet housing the Hedgewick's World of Wonders. (TV: Nightmare in Silver) and by the Cybermen themselves in the far future. (TV: The Timeless Children)
Transmats existed in three forms.
Close-ended transmats Edit
This form of transmat required a transmission/reception station at either end of the journey. The traveller entered the station where their molecular structure was scanned and stored for transmission, at which point their body was disintegrated into its component atoms. (TV: The Mutants onwards) They typically functioned at interplanetary distances, but ones powerful enough to cross the gulf between stars at trans-luminal speeds existed. (PROSE: Love and War)
While some systems transferred this physical component to the reception station, the complexity involved meant that in most cases only the structural data recorded prior to disintegration was transmitted, with a new physical form being constructed from a matter source at the other end. (PROSE: Down)
Open-ended transmats Edit
Open-ended transmats could complete transfer trans-luminal speeds. A Dalek transmat beam moved its victim across the distance between Earth and the edge of its solar system in mere moments. (TV: Bad Wolf)
Other variants utilised a travel capsule that might have enhanced the capacity of the system's matter conversion through providing additional computing power in addition to providing protection should the location being transmatted to was hazardous. The transmat was operated by a transmat terminal. (TV: Mawdryn Undead)
The Nimon made use of transmat capsules similar to those used by Mawdryn, and they made use of black holes that dove into hyperspace, creating a tunnel with an energy beam providing motive power. A single Nimon transmat capsule could transport up to two Nimon. (TV: The Horns of Nimon)
Portal transmats Edit
A variant of transmat opened a portal to travel from one point to another. A Dalek transmat portal was connected to Hellcombe Hall, Hellcombe Factory, Erik Graul's factory and in the trench system on France. (COMIC: The Dalek Project)
A Sontaran version of the technology, though disrupted by the Doctor's sonic screwdriver, proved easily repairable. Similarly the deployment of the T-Mat system was at least partially predicated on the ease of repairing the systems. (TV: The Sontaran Stratagem)
In 16087, the refugees of the Nerva Beacon were able to utilise a transmat to repopulate the Earth after being freed from ten thousand years of voluntary suspended animation. Admittedly benefiting from vast technological and scientific advances, they were still able to use receiver stations that, despite spending millennia unattended on a planet devastated by solar flares, remained largely functional with the only noticeable defect being a drifting of the reintegration point. (TV: The Ark in Space)
Transmat capsules could damage organic structures if they were not properly maintained. (TV: Mawdryn Undead) Certain advanced species — such as Time Lords — however possessed the knowledge and technical ability to intercept and even redirect transmat beams to new destinations apparently greatly distant from those actually intended. (TV: Genesis of the Daleks)
It was generally inferred that anyone's first journey on a transmat was particularly uncomfortable, often resulting in vomiting. (COMIC: The Keep) Even subsequent trips could have been discomforting, inducing disorientation and amnesia. (TV: Bad Wolf) In his first incarnation, the Time Lord Karlax showed tingling of his fingertips for an hour and tachycardia after a trip, and insomnia in the aftermath of his first trip. (PROSE: Engines of War)
Other references Edit
The Eleventh Doctor thought that Brian Williams sneaked aboard the TARDIS via a transmat. Rory Williams soon revealed to the Doctor that Brian was his father, Brian having been with Rory and Amy Pond when the TARDIS materialised around them. (TV: Dinosaurs on a Spaceship)
Behind the scenes Edit
Although teleportation technology had already been employed in the show (p.e. TV: The Evil of the Daleks) and the equivalent T-Mat was introduced in The Seeds of Death, the proper "transmat" was introduced during the tenure of the Fourth Doctor, since The Ark in Space.