Milk Milk was a liquid secreted by mammal s to feed their young . Different species could usually consume the milk of other species , as human s and Time Lord s commonly did with the milk of cows . ( TV : " Hide " ) It was often used as an accompaniment to tea . ( PROSE : " Fungus " ) The Ninth Doctor once implied that there was something unique in the universe about the milk that came from cattle , and that he regularly had to return to Earth just to get milk . ( TV : " The Empty Child " ) The Tenth Doctor later told Martha that he normally went to a farm in 9th century France for his milk . ( COMIC : " Wrath of the Warrior " ) Milk - producing species . Whether the female of a species exuded milk from its nipples or from simple ducts to nurture its young was one of the defining traits of mammals . ( PROSE : " The Year of Intelligent Tigers " ) Similar nourishing substances were produced by non - mammalian species . Malmooth could drink their own internal milk , ( TV : " Utopia " ) while the green milk produced by Skarasen s was fed on by the Zygon s . ( PROSE : " Sting of the Zygons " , PROSE : " The Bodysnatchers " ) The only known cure for spectrox toxaemia was the milk from a queen bat , a species native to Androzani Minor . The cure was discovered by Professor Jackij . The seemingly male Sontaran s could be genespliced to produce milk . Strax was very proud that he could produce " magnificent quantities " of lactic fluid and offered to nurse Melody Pond . ( TV : " A Good Man Goes to War " ) Milk as a beverage . Milk was also used by other species as a drink . The human s of Earth harvested and drank the milk of cow s . Milk was sold in cartons or glass bottles , and delivered by milkmen . ( TV : " The Stolen Earth " , " Hide " ) In some locations , such as the planet Sto , milk was sold in a milk market . ( TV : " Voyage of the Damned " ) Milk was often used in tea and coffee to add taste . It was sometimes drunk warm as a sleep aid . ( PROSE : " Theatre of War " , TV : " Invasion of the Dinosaurs " ) Like humans , cat s often drank milk . One one occasion , this made the cats of the United Kingdom vulnerable to alien attack . When a fungus from space found its way into Britain ' s milk supply , cats all over the country turned on their owners in a series of savage attacks . ( PROSE : " Fungus " ) Milkshake s were served in Iceworld ' s ice cream parlour . The owner Anderson reassured a customer they didn ' t stain after Ace poured some over the head of the customer . She then poured another over Anderson ' s head too . ( TV : " Dragonfire " ) The TARDIS food machine had a button labelled ' MILK ' . ( TV : " The Edge Of Destruction " ) . The Doctor . The Fifth Doctor , with the use of a half empty tank of oxygen , had to climb into the caves on Androzani Minor to obtain some bat ' s milk to cure himself and Peri . The milk was a cure for spectrox toxaemia . Sadly , the Doctor only managed to milk enough for Peri . As Peri came round the Doctor was in the late stages of the disease and he regenerated into his sixth incarnation to cure himself . ( TV : " The Caves of Androzani " ) The Seventh Doctor , in 1963 brought freshly delivered milk to Martin when he visited the Hand of Omega at the Funeral Directors . ( " Remembrance of the Daleks " ) . The Ninth Doctor travelled to Earth at least every five days , which Rose Tyler attributed to him having to get milk . He seemed annoyed that , of all the universe , it had to come from a cow . ( TV : " The Empty Child " ) The Tenth Doctor and Martha Jones fought and then helped a viking warrior they ran into when they stopped to buy milk . ( COMIC : " Wrath of the Warrior " ) Another time they tried to get milk they ended up in the Whispering Gallery instead of a grocers as intended . ( COMIC : " The Whispering Gallery " ) Larry Nightingale met the Tenth Doctor when he returned from a milk run . ( TV : " Blink " ) Rory Williams ran into trouble when he went to the market to get milk and a whisk for the Eleventh Doctor who was making proper ice cream in the TARDIS . He ended up pretending to be the Doctor in order to get an alien to leave . ( COMIC : " Rory ' s Story " ) The Eleventh Doctor admonished Melody Pond , telling her that she should call Amy " Mummy " , not " Big milk thing " . ( TV : " A Good Man Goes to War " ) After fighting several groups of monsters , the Eleventh Doctor met River Song and she asked him if he remembered to pick up milk . He dejectedly left again to get River ' s milk . ( COMIC : " Take a Bow ( Tie ) " ) The Eleventh Doctor once drank milk from a bottle . ( TV : " Hide " ) Milk as an ingredient . Milk was also the base ingredient for many foods , known as dairy foods . The Tenth Doctor showed a great fondness for most foodstuffs made from milk , keeping track of which galaxies had the best milkshake s and most expensive ice cream . ( COMIC : " Agent Provocateur " , " Escape to Penhaxico " ) The Eleventh Doctor claimed to have a doctorate in cheese making . ( TV : " The God Complex " ) Shortly after regeneration , the Eleventh Doctor tried several foods , among them butter ed bread , bacon , baked beans , and yoghurt before settling on fish fingers and custard . ( TV : " The Eleventh Hour " )