Death Riders ( novel ) Death Riders was the first story in the 2 in 1 " Doctor Who " books range . Publisher ' s summary . " It ' s not all fun at the galactic fair . . . " The Galactic Fair has arrived on the missing asteroid of Stanalan and anticipation is building around the construction of the fair ' s most popular attraction — the Death Ride ! But there is something sinister going on behind all the fun of the fair ; people are mysteriously dying in the Off - Limits tunnels . Join the Doctor , Amy and Rory as they investigate . . . Plot . Rodge was trying to find a shortcut in the tunnels where he could find Korl and give his survey results in . He was a little scared , even though he was denying it to himself . He used his torchlight to navigate his way . But then he began to hear something in the darkness . Something in the dark dragged claws along the ground towards him and he dropped the torch , which went out . Inside the TARDIS , the Doctor was running around the console as usual , ready to open the doors to a new scene . He opened the door and they found dark rock in their way . Amy and Rory didn ' t look happy , but the Doctor was enthusiastic . After licking the damp rock , the Doctor deduce s that they were on an asteroid . Blocking their way out , the Doctor tried again , turning the TARDIS doors around the opposite way . After turning around they went outside and found themselves in a dark tunnel . There was a noise coming from down the tunnel and the TARDIS crew decide to follow it . An enormous vehicle passes further down the tunnel . Walking further , they emerged inside a large cavern where hundreds of people were gathered around stalls and music resounded around the walls , tunefully . It was a huge fairground . They wandered around the fairground , the Doctor enjoying his food . Amy was enjoying herself too , but Rory held a grim face . They then met a clown who called himself " clueless " . Amy , noticing a coconut shy , tells Rory that he and her are going to win one . Rory was now beginning to enjoy himself after winning something for once . They meet up with the Doctor again who explains what he ' s found out . While sitting down , the Doctor explains to both of them that they are on a mining asteroid called Stanalan within the Torajii system . There was also a bit of community along with the mining and digging facilities . A woman came over and announced about the arrival of the " Death Ride " . When leaving the tent , Amy and Rory heard some more music . Amy tried to find where it originated herself and discovered a large beast . She suddenly realises that the creature is dancing in front of her , listening to the tuneful notes that originated from a mouth organ . After being asked the Doctor doesn ' t know what it is . The man is payed for his song . Amy isn ' t sure about the picture . At first she was scared , but now she felt pity for the creature to be used like a slave . The man playing the mouth organ is Garvo , who explains that the string connecting both him and the Drexxon is to help with their bond . Then the procession began in one corner of the large cavern . The procession was an orchestra who played beautiful music . They soon noticed a coffin , which every one was looking at as a sign of respect . The Doctor was wondering why he had died . The orchestra finished their song and the TARDIS crew were met by two of the instrument players , Harby and Vosh . They explained that the body was the person of Rodge who wasn ' t shown to anyone before placed in the coffin . The two boys explained about the roller coaster ' Death Ride ' and how its path avoided the Off - Limits tunnels . The Doctor , after hearing the details from the boys , decided that he would investigate . Amy remained in the fairground . The Doctor and Rory were now walking through the middle of a mining colony village in the tunnels . They arrive at the building site of the ride . A woman seemed to let them watch the work . The woman explained that they were hoping to get a few parts of the ride through Off - Limits tunnels , but it was highly unlikely . They here about the guy who knows everything , Perpetual Pete . The Doctor and Rory are keen to learn more about Perpetual Pete . He is restraining people from entering certain tunnels , claiming that they are dangerous . When he found him , the Doctor noticed that Perpetual Pete was the oldest of the builders . The man seems to be sorting out " linkages " . The Off - Limits tunnels have bad linkage because of molecular decay . It turned out that Perpetual Pete was the Health and Safety manager . After interviewing people , Rory decided that he ' d follow the Death Ride back to the fairground . Back at the fairground , Amy was listening to people on their opinions about Rodge and his decision to travel into an Off - Limits tunnel . A man told her that there wouldn ' t be another death in a while . However , back at the building site , Rory has returned to tell the Doctor that there has been another death . It was a woman , who had apparently been scratched and bitten maliciously . Amy returned to Garvo and the Drexxon as they performed once again . Harby and Vosh meet up with her . They explained that a woman had heard Garvo ' s harmonica playing down an Off - Limits tunnel . Moving closer to the music , Amy had a plan , she pulled the string from the creature ' s wrist , but it had a terrible reaction . Garvo had fallen over in terrified shrieks of pain . The creature put the string back over its wrist and Amy began to feel guilty . Amy disappeared through the crowd . The body was a mining engineer . Deciding to investigate , the Doctor was about to head down the tunnel , when he was restrained by Perpetual Pete . Thinking that something else was amiss they asked him why he was so sure that the tunnels were dangerous . The manager said nothing , but the Doctor was still suspicious . They headed back to Amy . Amy wanted to apologise to Garvo for what she had done , but couldn ' t find him , but found the Drexxon quickly slipping away into a tunnel . She met up with the Doctor and Rory and told them that she had to see Garvo because of stuff . But when they arrived there , they found him sprawled on the bed , looking up at the roof of the tent . Garvo turned out to be alright , but with an investigation of the leash , the Doctor deciphered that he had been hypnotised by the creature . But Amy had already gone to get the Drexxon , because she felt sympathy . The Doctor and Rory , realising the creature had been terrorising the Off - Limits tunnels , set off to find her quickly before anything happened . They finally found where she had gone . Now inside the tunnels , Amy is confronted by the Drexxon who had grown considerably aggressive . Amy was saved by Rory who had kicked a stone and suddenly a few people had gathered around to see what was happening . The Drexxon who had tried to escape from the stone , emerged once again and charged towards the people . It pounced at the fire - eater who released a ball of flame into the creature ' s stomach and it squealed away in pain . Perpetual Pete appears and the Doctor addresses him to try and get a bit more information about the Drexxons . Perpetual Pete explains everything . He had been on the asteroid for a very long time and had warned many people , even the mining corporation not to start digging on Stanalan . He talked of the Drexxons and how they had increased in violence and destroyed many planets . He and an army managed to trap the creatures inside a Perpetuity Chamber . There they would be held in stasis forever . They now knew that the Drexxon running around was a child . In a surprised moment , Perpetual Pete realised his mistake . The Death Ride ran really close to the chamber , the Drexxon could sabotage the ride to crash through the barrier . Harby and Vosh abruptly arrive , shouting that the Death Ride had been completed . The Doctor , Amy , Rory and Perpetual Pete were now running towards the " Death Ride " hoping to stop it before anything could happen . Harby and Vosh then took Rory towards the " Death Ride " and the Doctor , Amy and Pete headed for Garvo ' s tent , hoping to find him in good condition after being treated badly by the Drexxon . But when they arrived , the music player had disappeared . They realise that the Drexxon will use the train to break through the vault and the correct musical notes will open the chamber . At the ' Death Ride ' a large crowd of people had already gathered . The others arrive and Rory explains that he had asked them to stop the train , but they wouldn ' t listen . But it was too late , the crowd were beginning the countdown . The Death Ride set off and Amy and Rory were forced to embark . Amy and Rory were not enjoying their ride . The Doctor and Perpetual Pete were keeping with the train . The Doctor was pointing out children from the orchestra and telling them to get out of the train . The train then dropped down a steep hole . Amy yelled , " Geronimo . " The Doctor complains , " That ' s my line " , but then turns to the instrument players next to him . He explained that they would be performing a concert . Perpetual Pete didn ' t look very happy . Amy and Rory were now up again and decided that they would head down the train towards the engine .