The Dalek Invasion of Earth ( TV story ) The Dalek Invasion of Earth was the second story in season 2 of " Doctor Who " . It saw the return of the Dalek s , who had proven quite popular when they first appeared in season 1 . Terry Nation wrote the script , this time bringing the Daleks to Earth . This was the first story to be produced at the new Riverside Studios , the production team having moved from Lime Grove Studios . It also saw a quarry used for location filming for the first time . " The Dalek Invasion of Earth " saw Susan part company with the Doctor , the first of his companion s to leave . She does not reappear on television until " The Five Doctors " . During filming , William Hartnell fell after the ramp of the Dalek flying saucer , down which he was being carried by Richard McNeff ( Baker ) , suddenly collapsed . Hartnell fell on a metal camera stand , landing awkwardly on his spine . Although he was temporarily paralysed , he recovered sufficiently to continue the recording , but it was decided he should have the following week off to recover from the bruised back he had sustained . The Daleks first started using " exterminate " on a regular basis to refer to the killing of individuals . This furthers their parallels with Nazi sm , established in their debut . Here they go so far as to refer to the killings as a " final solution " , a phrase associated with Nazism . ( Prior to this , the Daleks had been using the term " exterminated " , but it was during the final episode of this serial , " Flashpoint " , that the word destined to become the Daleks ' catchphrase was uttered for the first time . ) This also is the first episode in which the Daleks are seen on Earth . This story sees several famous London landmarks appear . Most seem to be relatively unchanged two hundred years later . These landmarks include Big Ben , the Houses of Parliament and Battersea Power Station . The dating of this story provides contradictory evidence . Ian finds a calendar with 2164 on it , but suggests it hasn ' t been used since the invasion began . A local states that the bombardment started ten years ago , putting it in at 2174 , but in " The Daleks ' Master Plan " , the Doctor claims the invasion took place in 2157 . Terry Nation once suggested it took place in 2142 , but this seems to be an attempt to link the invasion to the Blitz , the event on which it was supposedly based . The 2014 audio story " Masters of Earth " uses 2164 , being set in 2163 itself . As with " The Daleks " , this story was adapted into a movie entitled " Daleks ' Invasion Earth 2150 A . D . " However , it underperformed and so this was the last " Doctor Who " serial to be adapted for the cinema . Synopsis . The TARDIS returns to London ; however , it ' s the 22nd century . With bodies in the river , and quiet in the docklands , the city is a very different place . The Dalek s have invaded and it ' s up to the Doctor to thwart them once again . Plot . World ' s End ( 1 ) . A man staggers towards the River Thames , wearing ragged clothes and a strange metal helmet . He screams , tears the straps off the helmet , walks into the river , and drowns himself . Near the same spot , the TARDIS materialises . The Doctor cannot see where they have landed , but it appears to have a similar atmosphere to Earth . When they leave the TARDIS it is clear that they have landed in London . Ian and Barbara are delighted they have returned home at last , but it is a curiously silent and deserted London . The Doctor is concerned about the decay they see around them and wonders what year it is , fearing that it is nowhere near Ian and Barbara ' s time . Susan tries to look over a wall , but she slips and twists her ankle . The force of her fall causes the bridge under which the TARDIS has materialised to collapse , burying the TARDIS and blocking the travellers ' access to it . The Doctor and Ian decide to look around in a nearby warehouse for tools to help unblock the TARDIS door . Barbara remains behind to look after Susan . Exploring an abandoned warehouse , Ian and the Doctor are unaware they are being watched . From a window , Ian spies Battersea Power Station with its chimneys damaged , while the Doctor finds a calendar marked 2164 . Back with the TARDIS , Barbara goes to the river to soak a handkerchief for Susan ' s ankle , but as she does she sees the body of the man that killed himself earlier . She returns to Susan only to find her gone and a dirty - faced man there instead . The man tells her that they have to get out of there before they get killed and that Susan has been taken by someone called Tyler . He urges her to follow as the sound of automatic fire is heard in the distance . Meanwhile , in the warehouse , the Doctor and Ian stumble across a corpse wearing the same strange helmet seen earlier . They also find an electronic receiver attached to the helmet and a whip on the body and discover that the man has been stabbed to death . They decide to return to the others . As they do they are shocked to see a flying saucer hovering over the city . Barbara is still following the man across the ruins of London . Tyler carries Susan down a flight of steps into an empty Underground station as Barbara catches up . Susan and Barbara demand that they find the others , but Tyler says that there is no time . Tyler activates a secret panel and David Campbell emerges from it , telling Tyler that he had a struggle with a Roboman and that they will have to tell Dortmun to change the storehouse . He also reveals that he saw the Doctor and Ian in the warehouse but thought they were enemies . Dortmun , a man in a wheelchair , arrives , and Tyler tells him that a saucer has landed at the heliport . Dortmun says that this time they will be ready for " them " . Dortmun is glad to see Susan and Barbara , especially since Barbara can cook . David goes to find the Doctor and Ian whilst Tyler takes Susan and Barbara below . Dortmun stays on watch , armed only with a knife , similar in style to the one that had killed the corpse in the warehouse . Ian and the Doctor have arrived back at the TARDIS to find the women gone . They decide to wait to see if they return . Ian finds a poster forbidding the dumping of bodies in the river and wonders if it is plague that has emptied the city . David spots them from a window but he also sees several Robomen converging on their position . The Doctor and Ian find themselves surrounded , but the Robomen only tell them to stop in flat tones . The two try to run for it , but they turn to see , rising from the Thames , a familiar foe . . . a Dalek . The Daleks ( 2 ) . The Dalek asks the Robomen why the humans were allowed so close to the river and why the area was not guarded . They get no answer . The Dalek orders that the Doctor and Ian be brought to the landing area and warns the Doctor that resistance is useless and that they have already conquered the Earth . In the resistance base , the humans listen to Dalek propaganda broadcasts demanding their surrender . A young , rather precocious woman called Jenny tends to Susan ' s ankle while Barbara prepares food . Tyler and Dortmun debate about whether they are capable of attacking the Dalek saucer with the numbers they have . Dortmun shows off a new acid bomb that he has created , which he is confident will shatter the Dalek casings . David returns , reporting the capture of the Doctor and Ian . They have been taken to the heliport at Chelsea . At the heliport Ian expresses his confusion , as they saw the Daleks destroyed on Skaro . The Doctor theorises that their encounter on Skaro was a million years from the present — what they are witnessing is the middle period of Dalek history long before their extinction . Ian and the Doctor are joined by two other prisoners . The Dalek guards usher the prisoners into the saucer . One of the other men tries to escape and is exterminated . Back in the base , David explains that the Daleks operate on some of their human prisoners and turn them into Robomen , but the transfer operation is unstable and eventually the Robomen go insane and turn suicidal . The saucer is where the transfer takes place , and he states that once inside the saucer no human has ever returned . On the saucer , the Doctor and Ian are put in a cell together with another prisoner , Craddock . Ian asks him how the invasion happened . Ten years before , meteorite s brought a plague to Earth , splitting the Earth into small communities . Six months later the Dalek saucers landed . Some humans were turned into Robomen ; others were destroyed or sent to the mining areas in Bedfordshire . Craddock does not know , however , what the Daleks want out of the ground . The Daleks discuss the imprisoned Doctor and consider him more intelligent than any human they have encountered . The resistance plans the assault . They debate ways of launching their attack . Barbara suggests using the Robomen helmets as a disguise to get them close enough to use Dortmun ' s bombs . Meanwhile , the Doctor attempts to manipulate a device inside the cell , which he suspects to contain a key to the door . Much to Craddock ' s derision , he judges the box to have some sort of light activated trigger . He releases the key and reverses the polarity of the force field around the door , setting the trio free . However , as soon as they are free they are recaptured . Ian and Craddock are imprisoned again , but the Doctor is taken away to be robotised . The Doctor is placed on a transfer table as , outside the saucer , the resistance forces gather . The fake Robomen are questioned by the Daleks as they enter the ship . The Daleks question them and — seconds before they are uncovered — the resistance attack . General confusion prevails and the Robomen get on board the saucer . All Daleks are called to arms ; however , the Dalek Commander orders the transfer of the Doctor to go ahead . Day of Reckoning ( 3 ) . Members of the resistance group overpower a Roboman and successfully free the unconscious Doctor from the machine . They escape from the saucer with the prisoners . Dortmun ' s bombs , however , are proving ineffective . Dalek blasts and gunfire mix with the chaos of dying men as they scramble away . In the confusion , Barbara is injured and Ian remains behind on the saucer whilst David and Susan are also lost . Tyler is separated from the Doctor . When he returns to base to find Barbara recuperating , he tells Dortmun that he is going to search for survivors of the raid and then leave London . Dortmun wants to go to the Civic Transport Museum , another gathering place , to get supplies so he can continue working on his bombs . Barbara and Jenny agree to go with him . In the saucer , the Daleks receive an order from Supreme Command to destroy London with firebombs and go to the mining colonies in Bedfordshire . The saucer lifts off , on its way to the mines . Ian emerges from his hiding place , only to bump into a robotised Craddock , who is escorting a prisoner for transfer . Ian struggles with Craddock and takes off Craddock ' s robo helmet . Whether through accident or by suicide Craddock stumbles against the transfer machinery and is electrocuted . The prisoner introduces himself as Larry — he had stolen aboard the saucer in order to hitch a ride to Bedfordshire to find his brother . They get rid of Craddock ' s body via a disposal chute . David and Susan hide from Dalek patrols and listen in horror as the sounds of extermination echo around them ( at one point , they hear the voice of a man gunned down by the Daleks as he mourns the rest of his family ) . Susan wishes she could just go back to the TARDIS and get out of here and suggests that she could persuade her grandfather to take David along . David tells her that running away does not solve all problems , and besides , Earth is his planet and he cannot abandon it . Susan thinks about how she has never had a place she could call home . David says that someday she will . Suddenly , they hear a noise . David draws his gun in anticipation of it being a Roboman or possibly a Dalek but finds Baker , carrying the drugged Doctor . Baker says he will be heading for the Cornish coast , but , just as he leaves the others , he is intercepted and exterminated by a Dalek patrol . On the streets of London , deserted except for Daleks , Jenny , Barbara , and Dortmun avoid the patrols and make it to the museum . There , Dortmun finds his notes and determines the fault was not with the bombs but with the dalekanium casings of the Daleks . He comes up with a new formula for the acid bomb . He wishes that he would have a second opinion and urges Barbara to show the Doctor if they are ever reunited . Barbara tells him he can give it to the Doctor himself , but once she leaves the room , Dortmun leaves his notes behind and goes outside to try the new bombs against the Daleks himself . Rising from his wheelchair he throws a bomb at them as they exterminate him . However , yet again the new bomb fails to make an impact . Barbara and a distraught Jenny make their escape . The Doctor begins to get feeling back in his legs . Susan tells him that David suggests heading north to meet with a resistance group there , but the Doctor says that he they should try to reach the TARDIS , tetchily observing that Susan seems to trust David ' s word over his . Susan protests that it is simply because David knows this time better . David returns , saying that there are patrols everywhere , and asks the Doctor for his advice as he is the senior member of the party . Somewhat mollified by the gesture of respect , the Doctor " suggests " to David that they make their way north . Susan is pleased . Hidden in the saucer , Larry tells Ian of his brother Phil ' s theory that the Daleks are mining to extract the magnetic core of Earth . The saucer finally lands and the Daleks disembark with their new workers and the Roboman guards . Ian and Larry leave through the disposal chute and make for the nearest tunnel . Back in London , two Robomen place a Dalek firebomb near the Doctor , Susan , and David ' s hiding place , and it begins to tick down . The End of Tomorrow ( 4 ) . The trio discover the fire bomb . The shock coupled with the drugs causes the Doctor to pass out , leaving David and Susan to defuse the firebomb on their own . David uses acid from one of Dortmun ' s bombs to burn through the casing and removes the timing mechanism before it can trigger the explosive . David suggests they leave the Doctor while they search for a way through the sewers out of London . Susan does not like the idea of leaving the Doctor alone , but David says they have no choice and will return to him as soon as they find a route . Meanwhile , Barbara and Jenny fix up a lorry from the museum in preparation to drive up to Bedfordshire . Jenny is characteristically pessimistic about the exercise , but Barbara convinces her that they are left with no option . Larry and Ian are moving through the countryside of Bedfordshire which has been decimated with Dalek mining equipment . They spot a group of human slaves pulling a carriage of metal parts towards a mine shaft whilst being whipped . Trying to get under cover , they meet a man called Wells , who thinks they are escaped workers . He tries to cover for them when a Roboman comes to take them for selection to be robotised . The Roboman attacks Wells for going against his orders , but Ian and Larry knock the Roboman out . Wells tells them he was here to meet a man named Ashton , a black marketeer . Ian wants to meet Ashton , hoping he has a way to get him back to London . Wells informs Ian that the Daleks have destroyed the city . In London , Barbara and Jenny ride out of the museum in the lorry , past Dortmun ' s corpse . They meet a Dalek roadblock , but Barbara crashes the lorry through the Daleks . Their position is reported back to the saucer , which gives orders to intercept them . As they race away they hear a noise and discover it to be a Dalek saucer hovering above them . Jenny and Barbara manage to leap out of the lorry before it is destroyed by the saucer . David and Susan move through the sewers . They discover a bullet and suspect there might be others down there . They hear a noise behind them . As they wheel around they discover that it is Tyler . Tyler informs them of alligator s that have escaped from zoos and now live in the sewers . The trio plough on to find a way to safety . Susan begins to get desolate but David says that one day it will be all over and they can rebuild the planet from the start . Susan finds the idea of a fresh start exciting , and David suggests that she could be a part of the rebuilding . Susan likes this suggestion . They soon lose track of Tyler . In an effort to find him Susan climbs down a ladder which becomes separated from the wall and leaves her hanging over an expanse of water where an alligator waits for her . David soon joins her and fires at the alligator . Tyler joins them and says he has found the Doctor . The trio return to the surface . In Bedfordshire , Larry and Ian stumble across a hideous creature and dive into a shack for safety . They discover Ashton , who is pointing a gun at them . Ashton is unsympathetic to the men ' s plight and refuses to take Ian with him to London . He is on the brink of forcing them out the door towards the creature , which he informs them is a Slyther , a guard dog for the Daleks . Just in time Wells comes in and presents Ashton with an item of jewellery in exchange for the food he has smuggled in and in order to smuggle Ian out . He agrees . However , the Slyther breaks through the window of the cabin and attacks and kills Ashton . Ian and Larry escape but come across a sheer drop as they are pursued by the monstrous Slyther . The Waking Ally ( 5 ) . The two try to run but are cut off by the Slyther . They elect to jump into a mining bucket suspended over the pit , and although the Slyther tries to jump after them , Ian hits it with a rock and causes it to fall to its death . They decide to hide out in the bucket in order to ensure that anyone that may have been alerted by the Slyther loses interest . Before Ian and Larry can climb out of the bucket , it starts to descend . In London , Robomen pursue the Doctor and his party back into the sewers . Tyler and David lay an ambush and manage to subdue them . The Doctor stops short of killing the Robomen , saying that he only kills beings if they pose an immediate threat to him . On the road to Bedfordshire and forced to continue their journey on foot , Jenny and Barbara find a hovel in the countryside with two seemingly unhinged women , seeking shelter from a storm . The women are left alone by the Daleks because they make clothes for the slave workers in exchange for food . Barbara offers them food in exchange for staying the night . The older woman whispers something to the younger one , who rushes off quickly , stating to Barbara and Jenny that she needs to deliver clothes . Ian and Larry finally reach the bottom of the shaft and jump down the last twelve feet before the bucket tips over . Larry injures his knee as he falls , but Ian is unscathed . Back in the house , the woman returns to reveal that she has been sent to get the Daleks , who take Barbara and Jenny as prisoner . The two women receive food for their betrayal . Back in the mine Ian wonders why the shaft contains only equipment made for shifting rocks and not processing ore . Larry repeats his brother ' s theory that the Daleks are after the Earth ' s core . They are interrupted by a working party led by a Roboman . They initially try to hide but Wells informs them that they will be seen . Their only option is to try to blend in with a working party . They are confronted by a Roboman — Larry ' s brother Phil . Larry pleads with Phil , trying to make him remember who he is , but Phil prepares to shoot them , saying that they are runaways . Larry tells Ian to run as Phil fires his machine gun , mortally wounding Larry as Larry tries to strangle him . Both die , with Phil ' s last word being a strangled , " Larry . . . " Alarms sound as the workers seize their chance for freedom . In the countryside , Susan and David flirt and wrestle before they unexpectedly kiss . They are interrupted by the Doctor and Tyler . The Doctor has deduce d the reasons why the Daleks are here — something deep beneath the Earth , tampering with the forces of creation . Tyler is sceptical but says that it is the only explanation as it is the only thing unique to Earth . Ian makes his way deeper into the mine , noticing Jenny and Barbara , who have joined a working party . Jenny is in despair , but Barbara says they must find the control room , as that is what the Doctor would do . Ian keeps hidden but tells Wells to pass word to Barbara that he is here . Before he can do this , Barbara comes up with a plan to get herself to the control room . She tells the Daleks that the rebels are planning an attack and shows them Dortmun ' s notes as proof of this . She asks to speak to someone in authority , and they agree to take her to the commanding Dalek . Meanwhile , the Daleks report to the commanding Dalek that they have almost reached the outer crust of the core . All that remains is to set up the penetration explosive . Once the core is removed , they will replace it with a power system that will allow the Daleks to pilot the planet anywhere in the universe . As this plan is revealed to the Daleks through a PA system , Ian uses a small shell as a hiding place . Little does he know that this is the penetration explosive . He is sealed in and moved towards the drop zone as he helplessly surveys the wires around him . Flashpoint ( 6 ) . Ian disconnects some wires inside the casing , stopping its descent . The Robomen start pulling it back up the shaft , while Ian opens a panel at the bottom of the casing and climb out using the rope that runs through the shell . A Dalek spots him , however , and severs the rope , causing Ian to slide down the shaft and fall against a door at the bottom of the pit . At that point , Barbara and Jenny are escorted into the Dalek control room . The Chief Dalek orders that all humans be moved to the lower galleries to be exterminated in the final blast . The Daleks relay the orders to the Robomen through a microphone , which Barbara notices . Barbara suspects that the Robomen get all their orders solely from the microphone and that if they were able to get to it they could override the Daleks orders . The Chief Dalek interrogates Barbara , and she tries to stall by telling them of an elaborate mutiny that involves Red Indians , the Boston Tea Party , Robert E . Lee and Hannibal , panicking the Daleks momentarily . She tries to use the microphone , but she is caught and recaptured . She and Jenny are immobilised with clamps around their necks to await destruction when the bomb explodes . Outside , the Doctor tells Susan and David to destroy an aerial on the far side of the mine with Dortmun ' s bombs whilst he and Tyler will go into the mine itself . Ian opens the door against which he has found himself and finds himself in the lower gallery . He discovers the Robomen and the human slaves hauling timber and hides . When they leave , he puts some of the spars into the bomb shaft , where it props the door open for him as well as blocks the path of the bomb . The Daleks are unaware of this , however , and evacuate . The Doctor neutralises the warning system . He and Tyler make their way into the control room , where they free Jenny and Barbara . He explains that David and Susan ' s mission will immobilise the Daleks . The Doctor tries to use the Dalek ' s scanners , but just as he gets David and Susan on the screen the Daleks come back sensing interference with their machinery . As the Daleks move towards a defiant Doctor , David and Susan succeed and the Daleks stop in their tracks . Barbara and the Doctor use the microphone to tell the Robomen to turn against the Daleks . Human workers and Robomen break into open revolt and stream out of the mine . Ian is reunited with the others . From where the bomb has stopped , it will not succeed in penetrating the crust but will still produce a gigantic explosion . As they reach higher ground , the bomb explodes , making the ground around the mine collapse and cause an entirely new phenomenon — a volcanic eruption in England . The Dalek saucer is caught in the upward thrust of the explosion . The invasion is over . Back in London , the resistance helps the Doctor uncover the TARDIS as the chimes of Big Ben herald a new beginning for mankind . Susan is saddened at the prospect of leaving , and the Doctor seems to sense this . He goes into the TARDIS while Susan goes to say goodbye to David . Barbara takes Ian back into the TARDIS so they can leave Susan and David alone . David tells Susan that he loves her and asks her to stay and marry him , offering her the place and identity she has been yearning for . Susan admits she loves him too , but she also needs to look after her grandfather , and she begs him not to make her choose between them . The Doctor , suspecting this all along and having heard Susan ' s pleas , makes Susan ' s choice for her . He double - locks the doors of the TARDIS , preventing Susan from entering . He tells a distraught Susan through the scanner that she will always be his grandchild , but she is a woman now , and he wants her to have a home ; David will take care of her . Saying one last goodbye and saying he will one day return , he makes the TARDIS dematerialise . Susan looks forlornly around the empty space where the TARDIS used to be , fingering the TARDIS key on the chain around her neck . David reaches his hand out to her and she takes it , dropping the key onto the ground and walking away . " One day I shall come back . Yes , I shall come back . Until then , there must be no regrets , no tears , no anxieties . Just go forward in all your beliefs and prove to me that I am not mistaken in mine . " - - The Doctor Motion picture adaptation . The story was adapted for the movie 1966 " Daleks ' Invasion Earth 2150 A . D . " starring Peter Cushing . It was the second and , to date , final film to be based upon episodes of the televised series . Numerous changes were made to characters and story for the film , and a key plot element — Susan leaving the Doctor — is eliminated entirely . Home video and audio releases . DVD releases . This story was released as " Doctor Who : The Dalek Invasion of Earth " in a two - disc set . Released : Contents : Rear Credits : Notes : Altered CGI effects : Digital releases . This story is available : VHS release . In the United Kingdom , this story was released as " Doctor Who : The Dalek Invasion of Earth " in a two - tape set consisting of two separate cassette cases held together by a plastic band . In the US , it was still a two - tape set , but it was released in a single , oversized cover . Released : Notes : The " Next Episode " caption has been removed from " Flashpoint " .