Sepulchre ( audio story ) Sepulchre is the fifth and final story in the Demon Quest arc , a series of audio dramas featuring Tom Baker as the Fourth Doctor alongside Richard Franklin as Mike Yates . Publisher ' s summary . The TARDIS arrives on Sepulchre , and the Doctor and Mike find themselves in an old , dark house . Who awaits the two men there ? What plans have been laid for their arrival ? They soon discover from their host — and his housekeeper — that this is the culmination of a terrible , grand plan — one with the Doctor at its very centre . One from which he may never escape . . . As the Atlas of All Time unfolds , the odds seem stacked against the three old friends . Which of them will fall before the night is out ? Plot . At Nest Cottage , the Doctor continues to search for a way to recover the missing Mrs . Wibbsey , who was taken by the Demon at the end of " Starfall " . Mike Yates makes dinner , oblivious to the two messages on the Doctor ’ s modified ( and temporal ) answering machine . One of the messages is Mrs . Wibbsey ; she claims she is in an old mansion with obscured windows , and she asks the Doctor to use the TARDIS to home in on her . She has a confession to make ; there was a fifth trinket in the bag from the church sale , which she never told the Doctor . The trinket is a golden half - heart pendant , the mate to the one found inside the meteor ( " Starfall " ) , and it is in her room . It ’ s stamped with “ CHRE ” , the mate to the other ’ s “ SEPUL ” . Joining the two activates it as a device ; it displays time - space coordinates . The coordinates take them in the TARDIS ( which is now fully repaired ) to the drawing room of a large , old mansion : Sepulchre . It ’ s located somewhere other than England ; the paintings on the wall are of another dimension . Mrs . Wibbsey finds them , and is annoyed ; she ’ s been there three weeks , due to time slippage ( or so the Doctor says ) . She points out that the TARDIS is gone , which it is . Oddly , she seems to be working in the house , just as she does for the Doctor at Nest Cottage . The Doctor expresses some regret for removing her from her original life ( * Hornet ’ s Nest * ) . She returns and says that she will show them to their rooms ; the Doctor offers her the completed pendant back , and subtly hypnotises her with it . She admits that she doesn ’ t know why she hid the pendant , or what is going on ; but she shakes off the trance , and leads them through the house . She says they will meet the owner , but not tonight . In his room , Yates notes that there is complete darkness outside , with not even stars visible . He finds himself locked in . The Doctor comes in , using his sonic screwdriver to unlock the door , and breaks the window ; they are in space , but with some type of protective layer of nothingness . He concludes that no one would be able to see in from outside , either — something is being concealed . They explore the house , and find a door with green light coming from beneath . The Doctor goes in alone for a time ; when he comes out , he has a collection of components in his pockets . The room is the dematerialisation chamber as seen in previous instalments ; and for the Doctor , it has deepened the mystery . They return to the parlour , and the Doctor says they are right on the edge of the universe . The Doctor has his messaging machine with him ; he remembers the second message and checks it . It ’ s from a former dancer named Ernestina Stott [ " Hornet ’ s Nest " ] , and she has done some research for him . She says the Cromer Palace of Curios — Mrs . Wibbsey ’ s former place of employment in the 1930s — suddenly burned down at 2 : 00 AM on April 14 , 1940 . Mike leaves him brooding in the parlour , and goes to find the TARDIS . He encounters Mrs . Wibbsey , who is quite despairing ; she suddenly changes her demeanour , and declares that the Demon is with the Doctor . Mike rushes her back to the parlour , where he finds the Demon facing the Doctor . It seems it ’ s not a dangerous situation , however , and the Doctor is enthusiastic , calling the Demon their host . They discuss their previous encounters ; the Demon calls it a long game to get the Doctor there . He admits that he is serving someone else . The Doctor gives the TARDIS key to Mike before returning to the Demon . The Demon says the Doctor will soon transcend and become a new order of being . The Demon transforms the room into a flaming pit , and tells the Doctor he is headed for his own tomb . Mike objects ; he is aware of future regenerations , and says the Doctor can ’ t die here , but the Doctor says that those things haven ’ t happened for him . The Demon says the Doctor will give up the secrets of time and space before he dies . He beckons the Doctor into the flames ; and to Mike ’ s shock , the Doctor steps in , and vanishes , with the Demon . Mrs . Wibbsey acts strangely , trying to get the TARDIS key from Mike ; she claims to know where the TARDIS is , and has to get away . She nearly overpowers him , until green flames burst from her ; she denies it ’ s her doing it , but the flames engulf them both , and carry them away . They find themselves in a cavern of green stone , with the flames on the ceiling . Ahead , they can see the Doctor , high on a ledge , entombed in an open , coffinlike structure , and covered with electronic connections . Mike climbs up , but is beset by a fear of heights . They are interrupted by the buzz of hornets approaching . Mrs . Wibbsey is possessed , and has been for some time . She is under the control of the powerful Hornets that the Doctor , Mike Yates , and Mrs . Wibbsey fought a year prior at Nest Cottage [ " * Hornet ’ s Nest " ] , and whose queen was banished in their last encounter . They have used Mrs . Wibbsey and the Demon to bring the Doctor here . They intend to turn him into the Atlas of All Time and Space , drawing out the Doctor ’ s mind — with all its knowledge and secrets — and turning it to their own ends , destroying his body in the process . Time Lords have an innate ability to see all of time and space at once ; they require this ability to recover their lost queen , and then nothing will stop them . They begin the process , causing the Doctor to suffer . Mike tries to get through to Mrs . Wibbsey and get her to fight the Hornets . She recalls the moment when they gained access to her after the Doctor ’ s last battle with them . The Demon transforms the chamber into a backdrop for the Atlas , which begins to form around them . While the Hornets and the Demon are distracted by the Atlas , Mike climbs the rest of the way to the Doctor , and yanks the Doctor out of the machine . Mrs . Wibbsey , still under Hornet control , climbs up to stop him . Mike , with the Doctor ’ s help , tries again to talk her back to sanity , but unsuccessfully . Desperate , Mike grabs her and pushes her into the sarcophagus . As it seizes on her instead , the Atlas blinks out . The Doctor announces that while the machine had started to copy his mind , it hadn ’ t started to erase the original yet . One screen shows Mrs . Wibbsey ’ s perception of time and space — small , but vibrant for her , with all the places she has been . Soon the Hornets will overcome the sarcophagus ’ s influence . The Doctor confronts the Demon , and tries to persuade him to betray the Hornets . He admits the value in it , but denies that escape is possible . The Doctor promises him liberty if he helps , despite the Demon ’ s past havoc at the behest of the Hornets . Finally he agrees ; and the two of them dismantle and adapt the sarcophagus ’ s control console , using the components the Doctor pocketed earlier . Meanwhile , the Hornets are starting to emerge from Mrs . Wibbsey . Finally , the two of them are ready to begin ; and vefore the Hornets can escape , they switch on the console . The modified machine is a sort of transmat ; it can send the occupants of the sarcophagus to any point in the Atlas . However , the current Atlas is small ; it ’ s only Mrs . Wibbsey ’ s perception , and limited to Earth . The Doctor sends the Hornets — and the Sarcophagus — to a specific date and time : April 14 , 1940 , 2 : 00 AM , in the Cromer Palace of Curios . Mrs . Wibbsey , however , was not transported . The Doctor rigged the machine to transport everything except sources of human DNA ; therefore , she was left behind , free of the hornets . She only remembers the recent events as a terrible dream . They can return home ; but first , the Doctor has a promise to keep : he must free the Demon . However , the Demon is gone , with the components from the demat chamber . The room collapses ; but the trio vanishes and appears in a blank room . With them are the demat chamber , and the TARDIS . The Demon intends to escape , although he requires life energy to persist in this dimension . As the chamber dematerialises , the Doctor admits that he miscalculated ; they hurry into the TARDIS and head home , as the asteroid crumbles around them .