The Touch of the Nurazh ( short story ) The Touch of the Nurazh was the fourth short story in the Short Trips anthology " " . It was written by Stephen Hatcher . It featured the Third Doctor and Jo Grant . Notably , it depicted the Third Doctor regenerating prematurely before his demise in TV : " Planet of the Spiders " , but his regeneration was reversed before it completely took hold . Summary . A man stands alone on a desolate planet . He feels an attack on his mind but it is weak and he is able to resist it . Instead , it begs for him to take it off the planet . Jo Grant goes to visit her uncle , Jack Canning , at Kenstone Hall . It is a convalescent home for intelligence operatives who have been wounded in the line of duty . It is not easy to gain admittance , but Jo has a UNIT pass . As she talks with Jack , she notices that his injured leg is much better . She also notices that Tom Berkeley , an old UNIT acquaintance who has been paralysed , is much better as well . She is shocked to see that Ted Parrish , a friend of Jack ' s , has actually regrown his missing hand . She thinks she might be mistaken , and when she asks Jack about it , he seems confused . As Matron Caxton leads Jo out the door , they are watched from an upstairs window . Jo drives off in a taxi . The car stops in the middle of railroad tracks , and Jo realises that the driver is dead and a train is fast approaching . The doors are locked but she manages to pull the driver out of the way and move the car just in time . Back at UNIT HQ , Jo briefs the Doctor and the Brigadier . The Doctor considers , then dismisses , the idea of the Master ' s involvement . The Brigadier is concerned that many of the patients at Kenstone are Britain ' s best deep - cover agents . Sergeant Benton informs the group that Jo ' s " driver " was actually a Kenstone resident . The Doctor and Jo head for Kenstone to visit its founder , Professor Geoffrey Thynne , but are denied . They leave , but plan to sneak in . They do so , unaware that they are being observed . They sneak into Jack ' s room . He appears to be in some sort of dream state , but mentions the word " Nurazh " . Before the Doctor can explain to Jo , they are seized by Jack and six other residents and strapped to hospital trolleys . The Doctor explains that the Nurazh are mind parasites that feed off mental energy and leave planets desolate when they have drained the energy from all life forms . Matron Caxton and Jack enter the room , accompanied by " Professor Thynne " — the Master , to no one ' s surprise . He explains that he found the weakened Nurazh on an empty planet and gloats that the Nurazh will help him control an army to take over Earth . The Doctor tries to warn him that it can ' t be trusted . The Nurazh , occupying Caxton , begins to control Jo ' s mind . The Doctor plants a telepathic trigger in her mind , but she is soon taken over . She has some trouble taking over the Doctor , as he is fighting her . They leave him alone and she and the Master discuss their plans . The Master learns the Doctor was right about the Nurazh — it has no interest in conquest . It tries to control the Master , and in fear he heads for a nearby filing cabinet — his TARDIS — and leaves . On the way out , he yells that he " will remember " ; the word " remember " releases Jo from the Nurazh ' s control . It is weakened from its attempts to control the Doctor and the Master , and Jo sneaks out unnoticed , freeing the Doctor . The Nurazh sends the controlled residents after them , who chase them to the roof . The Nurazh confronts the Doctor , and the two fight near the edge of the roof . They fall several stories ; Miss Caxton is dead . The Nurazh leaves her and enters the Doctor , who has also apparently " died " and starts to change into a new man . As Jo watches , the Doctor starts to change , then changes back . He wakes and tells her the Nurazh is dead . The residents are back to normal , though very confused . Later , the Doctor explains to Jo and the Brigadier that while he was in the process of changing , there were two Time Lord minds in his body , temporarily . It was too much for the Nurazh to handle , and it died . The Doctor stops Jo from making too detailed a description of what his future self will look like .