Tyrannosaurus rex Tyrannosaurus rex was one of the most famous dinosaur s on Earth . They lived towards the end of the Cretaceous period . It was one of the largest and most dangerous known land predators . ( TV : " Invasion of the Dinosaurs " ) The species ( or at least some individuals ) had some form of a language . ( TV : " Deep Breath " ) History . The Twelfth Doctor , Sonny Robinson , and Val Kent encountered a Tyrannosaurus rex during a visit to the Jurassic Era . ( COMIC : " Invasion of the Mindmorphs " ) A Tyrannosaurus rex was accidentally brought to London in the 1890s by the newly - regenerated Twelfth Doctor . It was murdered by the Half - Face Man after he had acquired its optic nerve . ( TV : " Deep Breath " ) During Operation Golden Age , Tyrannosaurus rex was one of the dinosaur s that was brought into the present through time eddy s . The Third Doctor attempted to catch one and Mike Yates stunned it using a special gun . UNIT transported it to a hangar where it was chained up . The Doctor intended to monitor it so that he could trace the source of the dinosaur appearances . However , General Finch broke its chains and it escaped , smashing through a wall before returning to its own time . The devices used to monitor it were sabotaged , leaving the Doctor without any readings . ( TV : " Invasion of the Dinosaurs " ) The Rani had several Tyrannosaurus rex embryos in her collection . These embryos were accidentally released after the Rani ' s TARDIS was sabotaged by the Sixth Doctor . Due to time spillage , these embryos then quickly grew into a greener , sleeker example of T . rex than those later encountered by the Doctor . ( TV : " The Mark of the Rani " ) The Tenth Doctor and Martha Jones encountered a T . rex in prehistoric Earth . The Doctor later brought one to 2008 to fight the Cybermen . The T . rex destroyed all of the Cybermen . ( PROSE : " Made of Steel " ) Tyrannosaurus rex was among the dinosaurs farmed by the Sanctified Empire . The Sanctified sent one T . rex to Cardiff in 2008 with a Harrowkind and several other dinosaurs to try and stop Vox . But Vox used the absorbed power of the Cardiff Space - Time Rift to obliterate the T . rex . ( COMIC : " Rift War ! " ) Several Tyrannosaurus rex were brought into Sydney Australia in 2010 by a chronal wave . They wreaked havoc in the city , then presumably died for freezing temperatures when another chronal wave brought the Ice Age into Sydney . ( COMIC : " The Age of Ice " ) Tyrannosaurus rex was among the specimens placed aboard the Silurian Ark by the Silurian s with which to repopulate the Earth once the incorrectly predicted catastrophe passed . When the Eleventh Doctor and his companions arrived on the Ark in 2367 , they found a T . rex nest and a sleeping juvenile . ( TV : " Dinosaurs on a Spaceship " ) A zoo on an Earth - like planet exhibited a Tyrannosaurus rex or a tyrannosaurus - like creature . ( COMIC : " The Didus Expedition " ) A Tyrannosaurus rex was transported to an alternative Death Zone on Gallifrey , where it proceeded to kill several Dalek s before itself being exterminated . ( AUDIO : " The Five Companions " ) A robotic Tyrannosaurus named Kevin briefly joined the Eleventh Doctor as a companion , although his size and appearance caused complications . ( COMIC : " When Worlds Collide " , " Your Destiny Awaits " , " Space Squid " ) Other timelines . On the Silurian Earth , Tyrannosaurus rex was one of the creatures bought back from extinction by the Silurian s and were possibly used for mounts . ( PROSE : " Blood Heat " ) References . After the Twelfth Doctor ' s mind was connected to a mind scythe , the " holiday snaps " the Doctor showed Kygon Brox included a Tyrannosaurus near Big Ben . ( COMIC : " The Instruments of War " ) Behind the scenes . According to material in " DWBIT " 7 , Tyrannosaurs were also native to the planet Raxas , and , along with the other Raxas dinosaurs , proved to be more than a match for a Dalek attack . They were so strong they could bite the Dalek ' s dalekanium casings in half and crush at least four Daleks with their massive feet .