Heavenly Host The Heavenly Host , or the Host , were service robot s used by Max Capricorn Starcruisers . They were fashioned to look like Earth ' s angels . Their purpose was to provide information and other assistance to crew and passengers . However , the Heavenly Host lacked autonomy and would do anything their master authority ordered , including criminal acts such as murder . History . Under the command of Max Capricorn himself , the machines turned deadly . They killed many of the passengers and crew of the Starship " Titanic " in 2008 as part of Capricorn ' s scheme to destroy his own ship and then retire a wealthy man . Several malfunctioned during the trip , leading to some rather nasty incidents : when one first - class passenger asked a Host to fix her necklace , the robot misunderstood the request and instead nearly broke her neck . Some of the Host were destroyed by an electromagnetic pulse set off by Bannakaffalatta , who used the last of his cyborg body ' s energy at the cost of his own life . After Max Capricorn was killed by Astrid Peth , the Host reverted to the next highest authority figure , the Tenth Doctor , helping the Doctor reach the bridge of the ship to save it . ( TV : " Voyage of the Damned " ) Technology . The Host spoke in a monotone voice and started sentences with the word " information " . Replies to requests were kept very concise , even to the point of poor grammar such as sentence fragments ; for example : " Information : stowaway . " and " Information : no witnesses . " . Security Protocol One allowed the person who executed it to ask three questions , which would temporarily override whatever other command the Hosts were executing until the three questions were answered , to which it would promptly return to its previous command . Additionally , at least one of the Host could be diverted from its current orders for a few seconds when the Doctor asked it in a raised voice : " Information override . You will tell me the point of origin of your command structure . " The Host complied , answering with : " Information : Deck 31 . " Each Host had a hinged jaw , which moved when they spoke . When given the command to commit murder , they would repeat the word " kill " numerous times . Each Host used a single Halo , mounted on struts protruding out of their heads , as a weapon which they threw at enemies , causing great harm due to its razor - edges . They also seemed to have a remote link to their users , as they would relentlessly bounce back towards them if they were deflected . The Tenth Doctor and his fellow surviving passengers used chunks of stray metal to deflect the halos with little success . However , the group combating them was saved by the cyborg Bannakaffalatta who used an electromagnetic pulse to disable the Hosts . A host could recover from the effect after a short time . Without its halo , when damaged , a Host would resort to hand - to - hand combat such as strangling a human by grabbing their neck and striking with their metal hands . They were capable of flight even without moving their wings and could hover mid - air . An individual Host had the strength of ten men and had a button on the back of their neck which would switch them off , making them rigid . When switched off , one could be carried and moved with ease . Its default position was standing still with their hands pressed together in front of them , seemingly as though they were praying . ( TV : " Voyage of the Damned " ) Behind the scenes . " The Visual Dictionary " . The source " " gave further information about the Heavenly Host : their metal hands could be used for dishing out karate - style blows to others , and their default position was standing upright with their hands in the prayer position . The non - narrative source " The Ultimate Monster Guide " gave an additional piece of information about the Host — their " face " was a gold - coloured blank metal mask .