The Doctor ' s TARDIS ( Blood Heat ) The Doctor ' s TARDIS was a TARDIS from an alternate timeline generated by Mortimus . It was originally the TARDIS of the Third Doctor from that universe . That incarnation died , killed by the Silurian s , and his regeneration was prevented by Mortimus . The TARDIS shut down and died along with him . When Ace retrieved the TARDIS key from the Third Doctor ' s body , it had become isomorphically neutral , meaning anyone telepathically authorised could bond with it to activate and gain access to the TARDIS . When dormant , the TARDIS ' interior dimensions were only enough to contain the console . When Ace activated it by placing the TARDIS key in a slot in the console , it connected with her mind and recreated the interior dimensions . ( PROSE : " Blood Heat " ) With his own TARDIS having been lost in a tar pit , the Doctor began to travel in this ship . Despite some problems involving the ship initially not trusting him , the Doctor eventually managed to get along with the ship until he gave it to the mysterious Muldwych , simultaneously reclaiming his original TARDIS from Muldwych after it escaped destruction in the alternate world via a Fortean Flicker . ( PROSE : " Happy Endings " ) Exterior . After the Doctor managed to repair it , this TARDIS had a working chameleon circuit . It could blend in with its environment . It became an Aztec idol in Mexico in 1487 . When it arrived on the " Titanic " , it became a large , featureless crate . ( PROSE : " The Left - Handed Hummingbird " ) Ace plotted an exterior of the TARDIS using the keyboard inside the console : a 25th century Axmeister tank . On discovering this , the Doctor reset it to the TARDIS ' control , upon which it disguised itself as a gingerbread cottage . The Doctor initially treated this as a mistake , but later revealed that it had been his first clue that their latest destination was the Land of Fiction , which he had concealed from his companions until he was ready to spring a trap on the Land ' s new Master . ( PROSE : " Conundrum " ) In London , the Doctor materialised the TARDIS around Nelson ' s Column , then disguised it as the Column . Mortimus ruined the disguise , hacking the circuit from his TARDIS and replacing parts of the column with the Statue of Liberty . ( PROSE : " No Future " ) Finally it appeared as a tarot reader ' s tent . The Doctor decided to permanently " fix " it to appear as a police box from 1963 , concluding that , while it was old - fashioned and out of date , he felt that the police box was him . ( PROSE : " No Future " ) Interior . The interior was taken from Ace ' s mind when she first activated the TARDIS . There were laboratories , living quarters , a swimming pool , cloisters and libraries within the TARDIS ' interior dimensions . She also created a new room for herself . ( PROSE : " Blood Heat " ) The console room contained a Edwardian chaise longue and , within one of the roundels , a thermos of coffee . ( PROSE : " Blood Heat " ) There was also a basket chair and a hatstand in the console room . ( PROSE : " The Dimension Riders " ) After Ace ' s departure , the interior took on the appearance of wood - panelled corridors with a 1930s style cage lift , plus an arboretum , a hospital ward , a complete indoor sports centre , a tennis court , a car garage , a water purification plant and a quarantine bay . ( PROSE : " Sanctuary " ) Systems . The console had an emergency dematerialisation switch . This TARDIS was initially able to alert Ace and direct her attention to certain matters . ( PROSE : " Blood Heat " ) The TARDIS had a working chameleon circuit ( PROSE : " The Left - Handed Hummingbird " ) until the Seventh Doctor permanently disabled it . ( PROSE : " No Future " ) The TARDIS ' state of temporal grace also functioned correctly , able to halt the missiles fired by the HMS " Revenge " at the Silurian ' s palace . ( PROSE : " Blood Heat " ) It contained a Jade Pagoda , an escape pod for the TARDIS which contained basic flight systems . ( PROSE : " Sanctuary " ) Personality . Initially the TARDIS did not trust the Seventh Doctor . It gave warnings , including sounding the Cloister Bell telepathically to the only one it did trust : Ace . ( PROSE : " The Dimension Riders " ) The TARDIS often became " sulky " when the Doctor was piloting it . While there was no day or night inside the TARDIS , it did dim the lights when it felt it should be night . ( PROSE : " The Left - Handed Hummingbird " )