Mel - evolent ( audio story ) Publisher ' s summary . Mirror mirror on the wall , something stalks the TARDIS halls . . . A glimpsed reflection in a dark and dusty corner leads Mel on a journey Through The Looking Glass . Witchcraft and shadow s reign . Mel must face the evil at the heart of it all , while the Doctor battles to save a TARDIS determined to prove it ’ s not only bigger on the inside , but darker . Much darker . Plot . The Sixth Doctor is off sulking in the TARDIS ' s theatre , after yet another attempt by Mel to get him on a proper cycle of diet and exercise . Mel takes the opportunity to look around the wardrobe of the theatre , and discovers a mirror that shows a dark reflection of herself . The Doctor rushes over to investigate and informs her that the mirror is a Space - Time Visualiser , an object that lets the viewer see any event in history . Suddenly , the TARDIS is filled with noises . Using the Space - Time Visualiser , the Doctor and Mel discover that a horde of goblin - like creatures are ripping out parts of the TARDIS and bringing them into a world within the Space - Time Visualiser . The Doctor quickly dresses Mel up to look like the dark reflection of herself , adding only a set of earrings that will allow him to communicate with her while she ' s in the other world , and sends her into the world of the Visualiser . Upon arrival , Mel finds herself in a version of her room in the TARDIS stripped of all personal touches . She wanders the halls of this version of the TARDIS and encounters a group of the goblin - like creatures . Pretending to be the dark reflection of herself , she demands to be taken to their leader . The goblins lead her to a room with a faceless woman , whose appearance is constantly changing . The Doctor and Mel establish a psychic link with the woman , and find out that the goblin - like creatures are Thrusks ; a race that disappeared from the main universe and has become a parasitic Vortex creature . The Doctor and Mel realise that the faceless woman is an ancient Time Lord , infected by the Thrusk and forced into a state of constant regeneration to prevent their expulsion from her body . The duo realise that the Thrusk mean to capture parts of the Doctor ' s TARDIS and bring them together with parts from Lady Tamira ' s TARDIS , in order to destroy the universe , and make a new one , using the Thrusk as the building blocks of the new universe . At this point , the psychic link breaks , and Mel is horrified to discover that her doppelgänger has arrived in the room , with a horde of Thrusk . Mel futilely attempts to trick the Thrusk into believing that she is their true leader , but her doppelgänger is able to break apart her argument . Mel tries a different tactic , and manages to convince the Thrusk that their leader means to destroy them all . Mel ' s doppelgänger doesn ' t deny this , much to the chagrin of the Thrusk . As Mel is pulled out of the Space - Time Visualiser , she witnesses the Thrusk attempting to attack Mel ' s doppelgänger . Later , Mel awakens in the control room of the real TARDIS , and witnesses the Doctor conversing with Lady Tamira . She thanks the two of them for saving her from the Thrusk and vows to return to her time on Gallifrey , and keep the secrets of the future safe . After she departs , Mel notes with some amusement that Lady Tamira looked exactly like Mel , which the Doctor assures her isn ' t out of the realm of possibility , before the two depart for their next adventure .