Hostile Action Displacement System The Hostile Action Displacement System , or HADS , was one of the defence mechanisms of the Doctor ' s TARDIS . When the outer shell of the vessel came under attack , the unit dematerialised the TARDIS and rematerialised it a short distance away after the attacker had gone , in a safer locale . ( TV : " The Krotons " ) However , another function of this was a " dispersal " instead of a " displacement " , which would allow for the TARDIS to appear to actually be blown apart , but in fact remaining intact in various pieces . ( TV : " The Witch ' s Familiar " ) The HADS had to be manually set , and the Doctor often forgot to do so . ( PROSE : " The Krotons " ) When testing the ship after his exile on Earth had ended , the Third Doctor briefly lost the TARDIS when the HADS was triggered by a hailstorm , the Doctor noting to Jo Grant in embarrassment after they rediscovered the ship that the setting for the HADS was slightly too high . ( PROSE : " The Suns of Caresh " ) While stuck on Earth and attempting to avoid meeting himself , the Fifth Doctor engaged the HADS to move the TARDIS . ( AUDIO : " The Mutant Phase " ) The Fifth Doctor had General Tillington fire laser s at the partially - materialised TARDIS in order to trigger the HADS as part of his plan to defeat the Dalek s . ( AUDIO : " Renaissance of the Daleks " ) The Rani was able to capture the Doctor ' s TARDIS in a tractor beam because the Sixth Doctor had neglected to set the HADS . ( PROSE : " Time and the Rani " ) The HADS activated itself when two Zygon s tried to steal the TARDIS . ( PROSE : " The Bodysnatchers " ) The HADS activated again when temporal corrosion threatened the TARDIS , sending Charley Pollard from 1 January 2008 to 15 January 1942 . ( AUDIO : " The Girl Who Never Was " ) After a particularly violent crash landing , the TARDIS used the HADS to move itself through time as well as space , appearing several days later . ( PROSE : " Dead of Winter " ) The Tenth Doctor tried to activate the HADS after Finn Dargo had hacked Emergency Program One and attempted to arrest the TARDIS ' occupants . The move allowed the TARDIS to materialise in an unexpected place in Dargo ' s ship , giving Majenta Pryce a slight advantage over Dargo ' s Intersol team . ( COMIC : " The Crimson Hand " ) While fiddling with various settings , the Eleventh Doctor re - enabled the HADS in time for it to activate and leave the Doctor and Clara Oswald in a sinking submarine near the North Pole in 1983 . It reappeared a short while later , but at the South Pole instead of the North Pole . ( TV : " Cold War " ) This event would later be referenced by Clara when the Twelfth Doctor assured her that the TARDIS would " turn up somewhere " after the space shuttle it had materialised in fell into a canyon . ( TV : " Kill the Moon " ) When the Dalek s attempted to destroy the TARDIS , ( TV : " The Magician ' s Apprentice " ) the HADS activated making it look like it had been destroyed , but the Twelfth Doctor later rematerialised the TARDIS using his sonic sunglasses , summoning pieces of it from all around the room ; this action was called the " Hostile Action " Dispersal " System " . ( TV : " The Witch ' s Familiar " ) Behind the scenes . According to the " Make Your Own Adventure with Doctor Who " novel , " Search for the Doctor " , Drax ' s TARDIS was shown to have a HADS , which was manually triggered when the vessel came under fire . As the " Make Your Own Adventure " series has multiple outcomes and no mechanism of determining the " right " outcome , this wiki does not consider the novel a .