The Forgotten ( comic story ) Summary . The Tenth Doctor discovers a museum dedicated to his lives and has to remember events from his previous incarnations in order to restore his fading memories . Plot . Amputation ( 1 ) . The Tenth Doctor wakes in a strange room , without the TARDIS or the sonic screwdriver , with only Martha Jones for company . Together they explore the building , soon learning that it is a museum dedicated to the Doctor . The displays consist of various items , such as a Dalek gun , the Seal of Rassilon and a Voord helmet . They enter a large room where the Doctor ' s clothes from nine of his previous incarnations are found , along with items he used during each incarnation , including jelly babies , a walking stick , a recorder and psychic paper . The Doctor states that he ' d be lost without his previous incarnations , saying he particularly loved his fifth . A strange man in a darkly lit room decides to test that theory . The Doctor suddenly becomes very weak . He realises he can ' t remember anything from before his encounter with the Sycorax on Christmas Day a couple of years ago . Martha brings him his walking stick from his first incarnation and he tells her a story of his travels with Susan , Barbara and Ian , where he saved a pharaoh ' s life with that staff . He also tells her how and when he dropped Ian , Barbara , and Susan off . Martha asks if he thinks that Susan is dead and he replies in the affirmative , stating that , as far as he knows , he is the last . The Doctor mentions he left Susan on a future Earth with a freedom fighter she fell in love with . The strange man chuckles , saying " If only that were true . " He reveals that he will force the Doctor to regenerate so he can steal the Doctor ' s remaining incarnations . The Doctor suddenly tells Martha that one of his hearts has stopped , and collapses into unconsciousness . Renewal ( 2 ) . The Doctor has fallen into a coma . Martha performs CPR on him and he wakes up . The Doctor and Martha explore more of the museum and find the recorder he played in his second incarnation . He tells Martha about this incarnation . The Second Doctor is on a spaceship with Jamie and Zoe . They find it has been attacked by snake - like creatures . They help the crew of the spaceship defeat them by playing on the recorder . Back in the museum the man watching the Doctor and Martha releases an Auton , ready to kill the Doctor and Martha . The Doctor remembers his third incarnation as Martha hands him the keys to Bessie , the car he used to drive while he worked for UNIT . He , the Brigadier and Jo Grant are in a car , chased by giant , spider - like robot s , with humanoid dog s as drivers . Jo uses her make - up mirror to aim the laser beams at the ships and the Doctor uses his sonic screwdriver to destroy the dog - like aliens , with Captain Yates ' s help . Back at the Museum the Auton approaches the Doctor and Martha . The Doctor fires a can of Nitro 9 at the Auton , killing it . The Doctor checks the readings of the TARDIS key . Horrified by the absolute lack of response , he tells Martha that it means the TARDIS has been destroyed . Misdirection ( 3 ) . Martha Jones asks if the TARDIS is actually gone . She and the Doctor return to the costume room and find a bag of Jelly Babies . This reminds him of his fourth incarnation . He recalls taking Romana to Paris for the second time , in the year 2000 . Romana notices a mime posing . She thinks he is trapped in time , but a time hole appears near him . The mime , the Doctor and Romana fall through the hole and land in a late 17th century sewer . They are soon questioned by guards ; the Doctor makes up an alias so he can have an excuse to boss them around . Following the trail , they reach the exit door , which is guarded by Taureau the Minotaur , who agrees to let them pass if they answer his riddle . When Romana fails miserably to answer correctly , the Doctor opens a wall , causing an explosion , killing Taureau and the mime . The Doctor and Romana escape through it . Back at the museum , the Doctor says to himself that Romana did pretty well for herself — until the Time War . He notices Martha has gone . He finds a cricket ball in his pocket . He thinks about his fifth incarnation . The Fifth Doctor is playing cricket near Allen Road . Tegan Jovanka and Vislor Turlough are watching . All of a sudden a Judoon ship flies over . The Doctor asks Turlough to fetch his five hundred year diary , while he and Tegan go to meet the Judoon . It turns out the Judoon have landed on Earth in search of the Eye of Akasha . Turlough returns and the Doctor fetches the Eye from the TARDIS before doing a switch with his cricket ball . He gives the Judoon the ball . In the museum the Doctor is looking for Martha . She is holding Ace ' s baseball bat , ready to defend herself . The strange onlooker releases a swarm of giant spider s from Metebelis III , surrounding Martha . . . Survival ( 4 ) . The Doctor arrives and distracts the Metebelis Three spider s with the crystal from his sonic screwdriver , which is similar to the type they search for . He and Martha Jones escape and the Doctor vaguely recalls the phrase " There ' s something on your back . " He collapses and begins to fade again . Martha hands him his sixth incarnation ' s cat brooch and goes off to hunt for the " Time Bracelet thing " and another screwdriver in the Fourth Doctor ' s costume , while the Doctor recalls a memory from his sixth life involving the brooch . He remembers when he and Peri Brown were in the court of an animal people with Peri accused of the first - degree murder of Professor Mis ' Kin Karac . On the first day of the trial , Peri tells the court how while in the market , a boy pushed a gun into her hands . It fired , killing the professor as he left the building . Peri says she never meant to kill anyone and the Doctor calls off questioning . On the second day , Professor Karac ' s assistant offers evidence against Peri and the judge calls a recess until the next day . The Doctor gets the assistant ' s permission to check out the lab , where the professor and he had been working on quantum flux technology . The Doctor finds the murder weapon in the lab and comes up with a plan . The next day in court , the Doctor pulls out the gun and aims at Peri , explaining that it is tagged with a genetic signature which the bullet uses to find its target . He also explains this was why the professor ' s assistant was behind Peri : so he could fire through her at the professor and make it look like she , being the one with the gun , had done it . He tells the assistant how he is currently wearing a cat brooch doused in chronal energy and with a drop of his blood on it . If he fires , the bullet will kill him , not Peri . The assistant confesses and is taken away . As Peri and the Doctor leave , the Doctor explains that the gun wouldn ' t have worked . He was bluffing , a bluff which the assistant fell for . Back in the museum , the Doctor speaks through a camera to the mysterious onlooker , who says that he and the Doctor have much in common , except for the obvious , and that he should have left him in the Crucible . The Doctor challenges him to come out , holding up an umbrella and remembering his seventh incarnation . He recalls the time that he and Ace ended up in the war of Agrovan Seven , which was declared a non - intervention site by the Time Lord s . Someone had given the Stryke s a Gallifrey an virus to use on the Marats and the Doctor had to stop it . They were captured by the Strykes , but escaped due to an air strike . They met a Marat , who took them to the Marats infected by the Strykes ' new bioweapon . The Doctor met with Doctor Treykan and gave her the antidote to the plague , hidden in his umbrella . He seemed to talk to the current Doctor , telling him to fight to survive . Back in the museum , the Doctor finds the same restorative inside the umbrella and begins to hear the Cloister Bell . He declares the impossibility of this , as it can only be heard in the TARDIS , the Time Lord Matrix or on Gallifrey , none of which they are at - - or are they ? Martha demonstrates knowledge of the Cloister Bell she shouldn ' t yet have and the Doctor remembers her saying he isn ' t the only doctor in the TARDIS , though she ' s only a medical student . The Doctor wonders again what ' s really going on . The mystery onlooker says they can ' t have the Doctor remembering his future just yet and sends out a Clockwork Droid and a Voc Robot . In the TARDIS , the Cloister Bell tolls , the interior is red and an alien life form has attached itself to an unconscious Doctor . . . Revelation ( 5 ) . After the Cloister Bell rings , the Doctor begins to question who or what Martha Jones really is . They are attacked by a Clockwork Droid and a Voc Robot . The Doctor and Martha escape . Martha hands the Doctor a cravat from his eighth incarnation and the Doctor begins to tell Martha about that life . The Doctor was alone in a prison cell on a planet , wondering whether the Last Great Time War was still being waged , when the cell door opened and the guards threw a new prisoner into the cell . Sixteen days later the Doctor and his new cellmate , Chantir , saw through the cell window a spaceship land . The Doctor said it was time to escape . The Doctor slowed his heartbeats to almost nothing and Chantir called in the guards . The Doctor and Chantir overpowered them and stole their laser weapons . The Doctor opened all the other cells to allow the other prisoners to escape . They travelled to the end of the hall and blasted open the door . Inside , the Great Key stood on a pillar in the centre of the room . The Doctor picked it up and told Chantir he planned to use it to recreate the De - mat Gun and possibly even modify the original to increase its lethality to remove millions from time and space at once . The Doctor and Chantir escaped from the prison by sliding down a power cable on the outside wall of the prison . Chantir left the Doctor to find his crewmates and the Doctor walked a few miles to recover his TARDIS . Martha asks if the Doctor was always alone in that regeneration . The Doctor explains to Martha that his eighth incarnation started and ended alone , because the Last Great Time War happened . He remembers how he saw Arcadia destroyed , laughed in the face of the Nightmare Child , Gallifrey sacrificed , which burned when the Cruciform fell , and how he ended the Time War with the Great Key that turned " the lock " and doomed everyone . Martha has the Doctor acknowledge that the victims knew the cost of what the Doctor did - saving everything else . She makes the Doctor focus his thoughts on what happened immediately after the war , such as meeting Rose , and gives him the psychic paper . The paper displays the message , " Everything is not as it seems " . The Doctor ponders that he spent much more time in cells and brigs than saving the universe before he had this utility and he remembers his ninth incarnation . The Doctor and Rose arrived in a World War I trench on Christmas Day and the Doctor showed the British occupants documents identifying him as Brigadier Bambera with the psychic paper . A football landed in the trench and the German s asked the British to hand them back their football . The Doctor challenged the Germans to a football match for their ball . As the British played football with them , the Doctor refereed . After the match , the Doctor and Rose left in the TARDIS . Martha hands the Doctor the Chameleon Arch biodata module and the Doctor regains the last of his memories . At that very moment , an individual resembling the Meta - Crisis Tenth Doctor , but calling himself the Valeyard , arrives with the Clockwork Droid and the Voc Robot and threatens to steal the Doctor ' s regenerations so he can regenerate himself . Reunion ( 6 ) . As the Meta - Crisis Tenth Doctor finishes his threat , the real Doctor laughs mockingly . He claims to have known it was a bad fake made by the creature who was responsible for the entire mess , using bits and pieces of the Master , the Valeyard and the Meta - Crisis Doctor to fabricate a poor amalgam to bedevil the Doctor . Infuriated at his plans being exposed , the being identifies itself : Es ' Cartrss of the Tactire , a parasitic race known as the Cranial Parasites . It tells him of how his planet was one of the many the Dalek s had stolen to power the Reality Bomb . He infiltrated the Crucible until its destruction , then entered the Doctor ' s TARDIS and attached itself to him in the effort that began the story . The Doctor uses the distraction to flee and " Martha " gives him the final clues to realise what she truly is - the TARDIS ' own mind , desperately trying to help its pilot shake off the parasite . The entire museum was actually the TARDIS matrix . Upon discovering this , the Doctor realises that the TARDIS could assume the form of anyone who had ever travelled with him . Prompted by the Doctor , the TARDIS assumes a variety of disguises of many past companions geared for combat , such as Steven Taylor , Leela and Harry Sullivan , while the Doctor examines the baseball bat . He realises it was , in fact , a chameleon circuit covering the Great Key of Rassilon , the final key to the last door of the Matrix , the one the robot s had been so desperate to keep them away from . The TARDIS begins assuming other shapes better suited to specific tasks , like Kamelion , who shrugged off attacks by the Voc Robot and the Clockwork Droid to open the door with the Great Key ; Sarah Jane Smith ; and Adric , whose intellect allowed him to design a way to break the parasite ' s hold on the Matrix by blowing himself , the infected Matrix components and the droids , with one of Ace ' s old Nitro 9 cans . Confronted by the last of the Tactire , the Doctor implements his plan - reminding the Matrix there was only one Time Lord in existence : himself . As he speaks , the power of the items he has gathered coalesces , and summons his nine previous incarnations - ten Doctors against a Tactire . He offers his enemy a final chance and Escart ' rss rejects it . Sighing , the Doctor asks the Matrix to eliminate all non - Time Lords from itself , purging the system of Escartr ' ss . The Doctors converse briefly . The Tenth is surprised , not realising it could be done , despite some squabbling and complaining on every side . Leaving his memories , the Doctor and " Martha " walk through the museum to the exit , modelled after the TARDIS . Having lost his key , the Doctor wonders how to open the doors , until Martha reminds him River Song already taught him how . Smiling , the Doctor thanks her and snaps his fingers . The doors open and flood the museum with light . Before leaving , he asks the TARDIS to assume a final form and she agrees . Susan Foreman appears before her grandfather , who begs her forgiveness and asks if she ' s had a good life . She hugs him and soothes him , saying she understood his thoughts and that she always knew he was doing the right thing . She beckons him to walk into the light , and the dream ends . The Doctor awakens inside the real TARDIS , and kicks the now - mindless Tactire out of the way . Reflecting how he ' s never truly alone with his oldest companion , he thanks her and decides to go on a little adventure - to Barcelona . References . The Doctor ' s items . Each of the previous Doctors had a display dedicated to their particular incarnation . The display consisted of their outfit , plus an item associated with them . These items include : Other relics of the Doctor ' s past adventures include :