Judoon The Judoon were a race of rhinocerid humanoid s from the planet Judoonia , frequently employed as a mercenary police force . They were known to be brutish and single - minded in carrying out their tasks , without regard for unintended consequences of their actions . Biology . Judoon were two - metre high humanoids with stocky builds and rhinoceros - like heads . They had large lungs and could breathe even in environments with low levels of oxygen . They were resistant to even harsh physical assault , such as being hit with a marble statue . ( TV : " Smith and Jones " ) Judoon had yellow blood . ( TV : " Prisoner of the Judoon " ) They also had rather small brain s ; a Judoon brain was able to fit in a chest that could easily be held in a humanoid palm , or fit in a teaspoon . ( WC : " Prequel : A Good Man Goes to War " , AUDIO : " Judoon in Chains " ) The Judoon had canines , incisors , molars and pre - molars - the teeth of an omnivore , which meant they ate meat and vegetable s . ( WC : " Teeth and Eating " ) Culture . The Judoon were known for their strict obedience to the law and their brutal efforts in maintaining it . Crimes like physical assault towards a Judoon incurred the death penalty , without chance for trial . The Doctor described them as logical , but stupid , and they seemed to favour methodical patterns of behaviour to a fault . ( TV : " Smith and Jones " ) Even on crucial missions , Judoons would obey local laws and signs , including traffic laws and " Authorised personnel only " and " Pay and Display " signs . Similarly , they would follow mission procedure rigidly and always get a form signed when commandeering transport . The Judoon were trained to use all known forms of transit , albeit not very well in the case of car s . ( TV : " Prisoner of the Judoon " ) Their strict compliance with an established order even made them despise development even with their culture , and those who go out of their norms may be ostracised . ( AUDIO : " Judoon in Chains " ) Their language was composed of many one - syllable words ending in a vowel , generally an " o " sound ( such as " blo mo co jo " ) but occasionally an " a " . Each sentence was composed of several of these words strung together . ( TV : " Smith and Jones " , " The Stolen Earth " , PROSE : " Judgement of the Judoon " ) Although they did not laugh , Judoons would shake and make laughter - like noise when amused . ( PROSE : " Judgement of the Judoon " ) A favourite sport among the Judoon was nukeball , but it was illegal on their planet to avoid the destruction of the population . ( PROSE : " The Coming of the Terraphiles " ) Judoon did not like opera . ( COMIC : " The Great Mordillo " ) The Judoon had nothing to compare with poetry . ( AUDIO : " Judoon in Chains " ) Technology . In general , Judoon technology was a dark red or black colour , and most instruments , such as their weapons , scanners and translators , were thick and pen - shaped , similar to a large sonic screwdriver . ( TV : " Smith and Jones " ) Communication and scanning . The Judoon had scanners which would tell the Judoon the species of the scanned being . However , the scanners could be fooled by previous close contact with another species . Metamorph ic beings capable of altering their internal biology using assimilated biomatter could also deceive the scan . They also were known to use a thick marker pen to mark " catalogued " people — those who had been scanned and deemed not to be a suspect — on their right hand . The Judoon had translation devices which worked by analysing the recorded voice of a being . The translation was reciprocal . It also had a contact device that reached every Judoon helmet , allowing the Judoon Captain to give orders with a press of a button . ( TV : " Smith and Jones " ) They used crime scene forensic scanner s . The Seventh Doctor bought a second hand one from a retired Judoon . ( AUDIO : " The Blood Furnace " ) Transportation . Judoon rockets . The Judoon rocket s were large , cylindrical craft with four boosters and four claws at the bottom which served as landing gear . ( TV : " Smith and Jones " ) Other transportation . The Judoon also had teleport technology . ( PROSE : " Judgement of the Judoon " , TV : " The Pandorica Opens " , " A Good Man Goes to War " ) The Judoon were known to use an HO scoop to transport buildings across space , and shield them with force field s as required by Galactic Law . ( TV : " Smith and Jones , AUDIO : Judoon in Chains " ) Judoon operated various land vehicles to find lawbreakers , including motorbike s that hovered , tank s and tall , all - terrain machines with four legs . ( COMIC : " A Rare Gem " ) Weaponry and armour . The " execution " punishment was delivered using a directed energy weapon with a red beam which could incinerate the target . Judoon wore heavy black armour . ( TV : " Smith and Jones " ) Other . In the 25th century , the Judoon were able to remotely lock down the communication and transport systems of spaceships . ( PROSE : " Judgement of the Judoon " ) History . The Judoon were originally a warlike race . They became mercenaries for various Galactic organisations , including the Padrivole Regency and the Shadow Proclamation . ( WC : " " ) They came to be one of the universe ' s most trusted mercenary races largely at the expense of the Ogron s , who lost their dominant position as " hired guns " because of a string of defeats by the Third Doctor . ( COMIC : " Fugitive " ) Early in universal history , the Judoon joined Rassilon in the Alliance of Races against the Hyperions . After the Hyperions were defeated , the Alliance then went on to purge the universe of other threats to universal harmony , one of those threats being Count D ' if of the Cybock Imperium . ( COMIC : " Gangland " ) In 102 , the Judoon were among the races who joined the Alliance . They came to Stonehenge and helped imprison the Eleventh Doctor in the Pandorica in order to save the universe . ( TV : " The Pandorica Opens " ) Judoon Captain Kybo of the Nineteenth Judoon Interplanetary Force became stranded in a Victorian circus , on the 19 May 1884 . He was bound in chains and forced to perform . Hot on his tail , the Sixth Doctor followed closely behind and met the same fate . Together with Eliza Jenkins , the three of them successfully delayed the following fleet of Judoon , and successfully revealed to the galaxy the truth behind Meretricious Gedge ' s plans regarding the terraforming of an inhabited planet . ( AUDIO : " Judoon in Chains " ) In 1902 , while working for the Galactic Council , the Judoon were conned into assisting in a plot to use Temporal Reversion Device s on Earth . As they abducted Balmoral Castle during this , the misunderstanding would be known as " the Balmoral Incident " . As a result of this , the Judoon were banned from Earth . ( WC : " " , PROSE : " Revenge of the Judoon " ) As events transpired , however , this ban was ultimately temporary . In 1963 the Judoon attempted to prevent the Cybock Imperium from stealing the Time - Gun of Rassilon from the vaults on Janizzar . The member of the Imperium used the time - gun on them and wiped them from history . ( COMIC : " Gangland " ) At some point after the 1980s , the Judoon came to Earth , despite it being out of their jurisdiction . They came to the house on Allen Road , looking for an Eye of Akasha . The Fifth Doctor followed them and was forced to help them look for it after they threatened Tegan . He handed it over and let them leave , but using sleight of hand he switched the Eye with a cricket ball . ( COMIC : " The Forgotten " ) In 2008 , a Plasmavore who was pretending to be an old lady called Florence Finnegan murdered the Child Princess of Padrivole Regency 9 and then escaped to the Royal Hope Hospital . The Judoon used an HO scoop to transport the Royal Hope Hospital to the Moon , as they had no jurisdiction over Earth . The Plasmavore had drunk the blood of a human , though , and passed as a human to their scanners . The Tenth Doctor was able to make her drink his blood , making her seem like an alien again . Martha Jones then convinced the Judoon to check her again . Finding her to be the alien they sought , they killed her . The Judoon then returned the hospital to Earth . ( TV : " Smith and Jones " ) The Judoon also investigated Slitheen activities on Earth . ( TV : " Revenge of the Slitheen " ) They had forced some members of the Slitheen family , including Kist Magg Thek Lutiven - Day Slitheen , out of Raxacoricofallapatorius . ( PROSE : " Revenge of the Slitheen " ) When the Tenth Doctor and Donna Noble came to the Shadow Proclamation to investigate the stolen planets , the Judoon were working there . ( TV : " The Stolen Earth " ) A Judoon was guarding the Shadow Architect when Colony Sarff entered the Shadow Proclamation , demanding to know the Twelfth Doctor ' s location . ( TV : " The Magician ' s Apprentice " ) In 2009 , Captain Tybo of the One Thousand and Fifth Judoon Guard crashed on Earth while transporting the prisoner Androvax . Androvax escaped , and Tybo ( wounded in his pursuit ) was forced to accept help from Sarah Jane Smith and her friends . He was eventually able to track Androvax down and return him to custody . He initially sentenced Rani and Clyde to disintegration for interfering with his pursuit ( by locking him in an EM shielded room ) , but he later commuted their sentences to planetary confinement after they helped prevent Androvax from escaping . ( TV : " Prisoner of the Judoon " ) The Judoon later took Androvax to a prison planet in the Calysteral cluster . ( TV : " The Vault of Secrets " ) Some time after these events Clyde Langer told jokes while some Judoon were present . The jokes weren ' t translated well and the Judoon put Clyde into prison . Mr Smith and Rani Chandra convinced Captain Tybo to let Clyde go , by giving food to the hungry Judoon . ( WC : " Teeth and Eating " ) In 2010 , a Judoon was at the bar where the Tenth Doctor came to visit Jack Harkness one last time before his regeneration . ( TV : " The End of Time " ) In late 2009 the Krulius captured several aliens . Mr Smith informed the Judoon that the Krulius was at the Doloth Star Base . The Judoon , led by Captain Tybo , brought the Krulius to their prison ship . ( COMIC : " Monster Hunt " ) All the captured aliens were set free . However the Krulius escaped from the Judoon and had managed to take clone cell samples of his former captured aliens and the Judoon with him , which allowed him to grew perfect copies of these aliens . ( COMIC : " Return of the Krulius " ) In late 2010 , three Judoon were part of the army of alien slaves led by the Krulius to attack Sarah Jane ' s house . When Clyde defeated several of the aliens , the Judoon regrouped with the army and the Krulius ordered them to retreat . Sarah Jane thought that the aliens in the army were under some kind of hypnotic influence . ( COMIC : " Defending Bannerman Road " ) A pair of Judoon police d the hidden trap street in London , which housed lost aliens on Earth under the protection of Mayor Me . As with the rest of the inhabitants they appeared cloaked in human form through use of the lurkworm s ' misdirection circuit . ( TV : " Face the Raven " ) When the Council of Dead were planning to sell humans in slavery , they had to avoid the attention of the Judoon . The Eleventh Doctor believed he could scare off the buyers , the Zu ' nar , with the threat of the Judoon . ( PROSE : " Attack of the Snowmen " ) In 2487 , the Judoon investigated the Invisible Assassin . They tracked it to New Memphis . The Tenth Doctor believed they would cause more harm than good and agreed to work with the Judoon commander , Rok Ma , provided the other Judoon kept off the planet . With the help of Nikki Jupiter , they were able to find the Invisible Assassin , bring down two criminal empires and find the bombs planted within Terminal 13 . After the mission , Rok Ma left the Judoon forces and joined Nikki ' s detective Agency . ( PROSE : " Judgement of the Judoon " ) In the 52nd century , Dorium Maldovar procured security software for the headless monk s by extracting it from the memory of a Judoon trooper . ( WC : " Prequel ( A Good Man Goes to War ) " ) Later , a squad of Judoon were part of the Eleventh Doctor ' s army which assaulted Demons Run in order to rescue Amy Pond and her baby . When Colonel Manton gave the Clerics the order to abandon Demons Run , the Judoon escorted them off the station and out of the quadrant . ( TV : " A Good Man Goes to War " ) In 51 , 007 , some Judoon took part in the tournament for the Arrow of Law . ( PROSE : " The Coming of the Terraphiles " ) The Judoon were called in to Agratis by Mason Vox to investigate the disappearance of the Jewel of Fawton . ( COMIC : " A Rare Gem " ) In 5000000057 , the Judoon had become corrupted and had joined forces with the Cybermen . Together , the two armies invaded New Earth with plans to upgrade and enslave the population . However , they were stopped by the Tenth Doctor and Martha . ( COMIC : " In - Flight Entertainment " ) Alternate timeline . In an alternate timeline , the Cybermen using Borg technology converted the entire Judoon race into Cybermen . ( COMIC : " Assimilation² " ) Behind the scenes . " The Brilliant Book 2012 " . According to " The Brilliant Book 2012 " , a book that contains non - narrative based information this wiki does not consider , the Church had plans to complain to the Shadow Proclamation about the Judoon ' s involvement with the Doctor . " The Visual Dictionary " . " The Visual Dictionary " , a book that contains non - narrative based information this wiki does not consider , contains more information about the Judoon .