The Mark of the Rani ( TV story ) The Mark of the Rani was the third story of Season 22 of " Doctor Who " . A new Time Lord villain , the Rani , was introduced in this serial . Synopsis . In 19th century England , the Doctor finds himself facing two competing enemies : his old adversary , the Master , and the Rani , another Time Lord with a sinister plan . The local population is turning violent and unpredictable . With a major meeting of the brains of the Industrial Revolution due to happen in the village soon , the Doctor must work out what exactly is causing all the problems . Only the Doctor can stop the Master and the Rani ' s evil plans . Plot . Part 1 . Something is amiss in the mining village of Killingworth in early 19th century England . Miner s are being gassed in the bathhouse and turned into thugs and vandals , attacking men and machinery , seen as Luddite s by other locals . The Sixth Doctor and Peri Brown witness this when they arrive in Killingworth looking for the cause of some sort of time distortion . They also notice one of the rampaging miners has a strange red mark on his neck . With his usual audacity , the Doctor foists himself upon the local landowner , Lord Ravensworth , who is concerned at the ferocity of the attacks , with the most passive of men suddenly turning violent and unpredictable . The answer lies in the local bathhouse . The Master has turned up at this key point in human history . He forces his way into the presence of the old woman who runs the bathhouse , in reality another Time Lord , the Rani . She is a gifted chemist and is using the set - up of the bathhouse to anaesthetise the miners and distill from them the neuro - chemicals that enable sleep . This is what causes the red mark on the victims . These chemicals are synthesised for use back on Miasimia Goria , a planet she rules and which the Master has visited , where her other experiments have left the inhabitants without the ability to rest . He persuades her they need to deal with the Doctor together . He also steals some of the precious brain fluid she has collected to ensure her collaboration . It is a rocky partnership , full of half - truths and deceptions . The Master goes to deal with the Doctor , egging on local miners to attack his enemy and persuading some to throw the Doctor ' s TARDIS down a mine shaft . The Doctor has meanwhile dressed as a miner and entered the bathhouse . He soon deduce s the Rani ' s schemes . She traps him but he challenges her ethics . She reveals she has been coming to Earth for centuries to harvest her precious chemicals . The Master convinces the Rani to let him deal with the Doctor . He has the TARDIS pushed down a mine shaft . The angry Luddites put the Doctor in a cart to ensure that he follows it . Part 2 . The Doctor is saved by inventor George Stephenson . He and Peri return to Lord Ravensworth ' s , where Stephenson has planned a meeting of scientific and engineering geniuses in the village . The Doctor is worried about the wisdom of such a meeting in the current circumstances , but the Master is so desperate to see the event take place , he uses mind control of Stephenson ' s young aide , Luke Ward , telling him to kill anyone who tries to prevent it . The Master wants to use the finest brains of the Industrial Revolution to speed up Earth ' s development and then use the planet as a power base . He strikes a deal with the Rani ; she may return to Earth at any time to harvest more brain fluid if she helps him achieve this . While the villains are away , the Doctor returns to the bathhouse and dodges booby traps to enter the Rani ' s TARDIS . Her control room holds jars of preserved dinosaur embryos . She summons her ship to the old mine workings with a remote control device , with the Doctor still inside . He hides while his adversaries talk . The Rani has also set land mine s in nearby Redfern Dell . When the coast is clear , the Doctor slips away to report back to Ravensworth , Stephenson and Luke , who is behaving strangely . Peri is making herself useful by using her botanical knowledge to make a sleeping draught for the afflicted miners . Her quest for herbs leads her to Redfern Dell . The Doctor surprises the Master and the Rani , who are lurking at the edge of the dell . Soon after he does , he sees Luke step on a mine and get turned into a tree . The Doctor takes the other two Time Lords prisoner with the Master ' s own Tissue Compression Eliminator . Peri takes charge of them but the Rani ' s deviousness outstrips the Master ' s and she is the one who enables them to escape . The Rani and the Master flee in her TARDIS , but the Doctor also has a trick or two : he has sabotaged the navigational system . The ship is out of control . In the destabilised condition , one of the jars holding a Tyrannosaurus Rex embryo falls on the floor and the creature , affected by the time spillage , starts to grow . The Doctor and Peri make a swap with Ravensworth , who has retrieved the TARDIS . He gets the phial of brain fluid , which he is told to give to the affected miners . Before the eyes of an astonished scientist and his financier , the TARDIS departs . . . Home video and audio releases . DVD releases . This story was released as " Doctor Who : The Mark of the Rani . " Released : Contents : Notes : It was released as issue 63 of the " Doctor Who DVD Files " .