The Highgate Horror ( comic story ) Summary . Part one . At the Highgate Cemetery , Jess Collins is calling for Dave , who is not answering . To her shock , however , she is met by an unseen menace . This figure is merely the Twelfth Doctor , and Clara is not far behind . Jess explains that she initially mistook the Doctor for " the vampire " - specifically , the Highgate Vampire which dominated the news a few years before their current setting of 1972 . Suddenly , the three hear a scream which Jess recognises as Dave ' s voice . As they reach him , however , they find his body lifeless and completely drained . A distraught Jess explains that Dave simply wanted to prove the vampire ' s existence , and his mere curiosity has killed him . Clara , putting her hand on a grave , feels a curious static sensation ; however , the Doctor puts off investigating that oddity , as they have a vampire to hunt . Jess , who managed to catch a glimpse of the vampire , describes it as a grey figure which appeared to be gliding instead of walking . As the Doctor investigates unusual marks of vandalism ( including a Victorian symbol of death ) , he finds himself pulled into a castle . Clara and Jess follow him into the castle , only to find him in the grasps of the Highgate Vampire . . . Jess points a torch at the vampire , and the creature flees . Nevertheless , the Doctor is unconscious , and the two women must drag him . As the group walks down Egyptian Avenue , they encounter a cult angry that their " circle of enlightenment " has been broken by the intruders . The group , which is attempting to commune with the spirits , does not believe in the vampire ' s existence . . . until one of the cult ' s members gets grabbed by the creature . And as luck would have it , numerous creatures of the same sort follow it out . The Doctor , who is regaining consciousness , suggests they run to the TARDIS . However , they soon discover that the ship has become a mere police box - shaped tombstone . The group , still chased by the vampires , has nowhere to go . . . Part two . The vampires appear to be scared of Clara , so she manages to hold them back . Gabriel Rosewood ( the cult ' s leader ) , believing it is " he " who the vampires dislike , offers to save everyone , so the Doctor and Jess run after his group . Unfortunately , they realise that have left without Clara , in whom the vampires seem to have gained interest . . . The Doctor and Jess find the rest of the group , and the former begins to question the creatures . They explain that they are a savage species called the Corvid . Living in the time vortex , they travel to areas where death is abundant . The Doctor suggests the humans flee , but Gabriel encourages them to consume the rest of the group , exclaiming that " it ' s feeding time ! " He explains that he had attempted for seven years to encounter the Highgate Vampire , whose power fascinates Gabriel . He had manipulated the group with talk of spiritual enlightenment , but in reality he merely wanted the vampire ' s power . Jess pushes Gabriel to the vampires , though he is not dead . The rest of the group finally runs . They find themselves reunited with Clara , who the Corvids still appear to dislike . The Doctor , Clara and Jess figure out that Rosewood ' s ley line ( a " psychic hotspot " ) is holding the Corvids in the cemetery , and that they are now feeding on the psychic energy of the living . Additionally , the Doctor realises that Clara ' s echoes which constantly live and die give her a unique interaction with the time vortex , explaining the Corvids ' dislike for her . Clara rests her hand on the ley line , opening a portal to the time vortex . As the Doctor explains , the Corvids are being sucked back where they came from . Fortunately , this brings the TARDIS back to its former state . The Doctor notes that in this cemetery , ordinary people rest alongside those who massively changed the world . He promises that they , as well as Dave , will be remembered : " As long as we remember , they ' ll have all the peace they deserve . " Plot . " to be added " External links . " to be added "