Catkind The Catkind were a species of humanoid felines that originated on the planet New Savannah but soon spread across the New Earth Empire . ( COMIC : " Agent Provocateur " ) Biology . Physical appearance . Catkind had some similarity to the non - humanoid cat s of Earth , though they were closer to the size of a human . They had fur in a variety of lengths and colours , including brown , black and . ( TV : " Gridlock " ) They had retractable claws which they could use for defence . ( TV : " New Earth " ) Though physically similar , they were different in internal anatomy . ( COMIC : " Agent Provocateur " ) Life cycle . Catkind reproduced in their teenage years , and often had litters of several kittens . They could also reproduce with humans . The offspring would look just like kittens of conventional Earth house cat s , though capable of speech . Catkind could live for at least thirty years . Novice Hame , a member of the Sisters of Plenitude , was young in the year 5 , 000 , 000 , 023 at the time of the order ' s dissolution , and lived beyond the Face of Boe ' s death in 5 , 000 , 000 , 053 . ( TV : " New Earth " , " Gridlock " ) Culture . Some Catkind , such as Novice Prin , feared creatures known as sabrewolves . ( TV : " The God Complex " ) History . In 2010 , the Eleventh Doctor and Amy Pond saw a Catkind member eating at a diner in New York City on Earth which was famous throughout the galaxy . ( PROSE : " The Forgotten Army " ) One Catkind , Novice Prin was kidnapped by a prison ship and fed on by a Minotaur . ( TV : " The God Complex " ) Circa 4 , 999 , 999 , 740 , Catkind lived on the planet New Savannah . They were a primitive people at the time , and their natural resources were running low . The New Earth Empire came to New Savannah , and brought it and Catkind into the empire . They agreed to give the Cats autonomy until the year 5 , 000 , 000 , 000 , when control would be given to the New Earth Empire . Within fifty years , Catkind had reached the same level of technology as the human s , and Catkind grew to distrust them . In order to avert a potential war , they left the Earth empire cities , which were then covered by empathic force field s , stopping any Cats from returning . Myths would spring up about these Cats , specifically about them being angry spirits . In the intervening centuries , a cult sprang up to oppose human influence . With the help of Bubastion , they destroyed the headquarters of Vedela Defense Systems , which controlled the force fields around the city . At the stroke of midnight at the start of 5 , 000 , 000 , 000 , the forcefields were shut down and gigantic robots , disguised as undead Catkind , entered to the city . Unfortunately , Bubastion had programmed them to attack everyone , intending to use New Savannah for his own purposes . When Garrard Townsend , a member of the cult , learned they were being used , he turned the force fields back on and deactivated the robots . ( COMIC : " Agent Provocateur " ) The Sisters of Plenitude ran a hospital near New New York on New Earth . They had cures for nearly every known ailment and were able to heal their patients at a remarkable success rate . Unfortunately , these amazing skills were gained by using thousands and thousands of grown human clone s known as " the Flesh " . They were infected with every known disease and culled when any began to think . These disease carriers were released by Lady Cassandra and cured by the Tenth Doctor , producing the new human s . The Sisters were arrested by the NNYPD for their crimes . ( TV : " New Earth " ) After the loss of the New Earth Senate to a deadly mood virus , several Cats were trapped in the Motorway , including Thomas Brannigan . ( TV : " Gridlock " ) Behind the scenes . Though the name " Catkind " has not , to date , appeared on - screen , the production team of " Doctor Who " has apparently made this the official name of the species . The term " Catkind " was later used in PROSE : " Fairy Tale of New New York " .