Block Transfer Computation A Block Transfer Computation was a mathematical process used to create objects and affect spacetime in other ways through the power of pure mathematics . The process usually involved chanting . Functioning . Block Transfer Computations could create or re - create any object or spacetime event , provided enough mathematical information was supplied . ( TV : " Logopolis " ) The Computations could also re - create or even duplicate people . Adric , imprisoned by the Master in a hadron web , created an entire city and its people . ( TV : " Castrovalva " ) Living creatures , like the Ceccec , could be made using Block Transfer Computation . ( PROSE : " The Tomorrow Windows " ) Artificial intelligences could be made as well . ( AUDIO : " Unregenerate ! " ) Block Transfer Computation could even allow time travel , though it would require a quorum of twelve people . ( AUDIO : " The Boy That Time Forgot " ) Computer s could not do Block Transfer Computations as the calculations themselves would alter the nature of the computer . Though they were working on technological means to do so , the Logopolitan s were destroyed before they completed it . As such , organic life forms had to do the work as morphologically unstable living organic matter could handle the stress of reality - changes caused by block transfer mathematics . The Monitor ' s people spoke their computations aloud for this reason , ( TV : " Logopolis " ) but there were few others . The correct organic material could be found with Gallifrey , Axos , and possibly even Nestene matter . ( PROSE : " " ) Usage . The Logopolitan s were the first to develop Block Transfer Computations . ( PROSE : " " ) They used Block Transfer Computations to create a duplicate of the Pharos Project to maintain the CVEs which prevented entropy from destroying the universe . ( TV : " Logopolis " ) The Time Lord s used block transfer matrixes as a function of maintaining the outer plasmic shell and interior configurations of TARDIS es . ( TV : " Logopolis " , PROSE : " " ) The Eighth Doctor used it to design the TARDIS ' gardens . ( AUDIO : " Scaredy Cat " ) They also used Block Transfer Computations to create duplicates of the Eye of Harmony to power Gallifrey an timecraft . ( PROSE : " The Quantum Archangel " ) Using Block Transfer Computations and wormhole technology , the Eleventh Doctor was able to connect the inside of the TARDIS and a safe in which Harry Houdini was locked inside . ( PROSE : " Houdini and The Space Cuckoos " ) The Fifth Doctor attempted to use Block Transfer Computation to locate the TARDIS when it was stolen by Thomas Brewster . However , because of the Doctor ' s subconscious guilt over the recent death of his companion Adric , he inadvertently sleep walked through time to the moment of his death and helped Adric use the computations to land the freighter he was about to crash into Earth , creating an alternative timeline . ( AUDIO : " The Boy That Time Forgot " ) The Remote were known to use Block Transfer Computations . ( PROSE : " Interference - Book One " ) The Remote receiver of the Eighth Doctor ' s companion Compassion also unintentionally processed the signals she received from the Doctor ' s TARDIS into Block Transfer Computations , resulting in Compassion mutating into a Type 102 TARDIS . ( PROSE : " The Shadows of Avalon " ) The Mad Mind of Bophemeral used Block Transfer Computations to create an army . ( PROSE : " The Quantum Archangel " ) The Pool used Block Transfer Computations to create defences for itself and horrific imagery . ( PROSE : " Deceit " ) The Farrian stole Block Transfer technology during their conquests . They used it to open CVEs and raid E - Space . ( AUDIO : " The Invasion of E - Space " ) The Unthinkable City was created by Mr Qixotl using Block Transfer Computation and matter augmenter s . ( PROSE : " Alien Bodies " ) Zhe Ikiyuyu used Block Transfer Computation to create art form known as block transfer sculpture . Zhe was the only one who managed to provide an AI persona for a block transfer sculpture when they created the binary apprentice using an organic matrix called the quantum sphere . ( COMIC : " The Arts in Space " )