Deadly Download ( audio story ) Deadly Download was the seventh " Sarah Jane Adventures " audiobook released . It was written by Jason Arnopp , produced for AudioGO and read by Elisabeth Sladen . It appeared in British shops midway between the CBBC broadcasts of series 3 and series 4 . Publisher ' s summary . Sarah and friends battle a deadly computer virus in this exclusive audio story , read by Elisabeth Sladen . Sarah is in a Christmas sy mood , but her cosy afternoon listening to carols is interrupted when Mr Smith suddenly announces that danger is imminent . The supercomputer has detected abnormal internet activity in the vicinity of Bannerman Road . Something alien is downloading into two PCs on the street — a computer virus over fifty times more destructive than any other on the planet . Both residents were chatting online when they started the download : but who were they chatting to ? And what does the mysterious chatterbox want ? It is up to Sarah and friends to find out , before the deadly download takes over the world . . . Plot . On a cold November afternoon , Sarah Jane Smith listens to Mr Smith ' s Christmas tunes from his media archive . Suddenly Mr Smith says that there is a very dangerous situation close by on Bannerman Road . Sarah calls Luke , Clyde and Rani to join her . Two minutes later they are inside her attic . Mr Smith tells them a dangerous and possibly alien computer virus is downloading into two personal computers on Bannerman Road . Then Mr Smith shows two video feeds with an elderly woman , named Doris and a young boy , named Oli on webcam . These users can see Sarah , Clyde and Rani too but can not hear them . Both of the users are in a chat room . They have got a message with the same download link on which they clicked . Then Mr Smith establishes an audio connection with Doris ' computer . Doris ' computer is finishing the download , a sound of metal being twisted and bent can be heard , accompanied by malicious laughter . Something is coming out of the computer . Sarah Jane talks to Doris and tells her to stay calm . She also wants to know where Doris is living . Doris replies that she is living at 54 Bannerman Road and runs out of the room . The webcam seems to follow her looking down at her from the middle of the living room . Then the video feed breaks . Rani and Clyde run down the stairs to Doris ' house . Mr Smith now establishes an audio connection with Oli ' s computer . Oli is joined by his mother Trish . Sarah talks to Oli and tells him that he has to evacuate the house , because his download will damage the computer and make it explode . Then Sarah and Luke go to the streets to meet Oli and Trish . Meanwhile , Rani and Clyde arrive at Doris ' house . They get into the house and arm themselves with things from Doris ' kitchen . Then they see that Doris is chased by a locust made of metal . Rani hits the locust with a pan , then the locust vanishes . Clyde goes outside and tries to find the locust . When Clyde is away the locust attacks Rani and an alien intelligence takes control over her mind . As Clyde returns to the room the locust seems to be gone . Rani tells him that she is fine . They leave the house and take the remains of Doris ' computer with them because Doris doesn ' t want to keep it at home . In the meantime Sarah and Luke arrive at Oli ' s house . Oli is exited to leave the house but his mother isn ' t so pleased . She expects that Sarah and Luke want to harm them . When the same noise appears as in Doris ' home Trish lets Sarah and Luke into her room . A robot locust is getting out of the laptop and flying towards Sarah and Luke . Then Sarah throws water from a flower vase at the locust . The locust falls onto the ground . Luke takes the deactivated locust with him . Rani and Clyde join them . Then the Bannerman Road gang leaves Trish and Oli . At the attic Sarah realises that there is something wrong with Rani , but can ' t say what it is . Then Rani leaves the attic . She says that she wants to call her parents . Rani has no control over herself and hears herself speak against her will . She phones Ian Webster and tells him that Clyde Langer fancies Sonia Parks , which could be used to their advantage . She also gives Clyde ' s phone number to Ian . Meanwhile , Mr Smith scans the locust . He tells Sarah that the locust solely is made from Earth technology . The locust device consists of various components of the laptop . The download was a blueprint of the robot , which physically created itself out of the components of the computer . Suddenly Clyde gets a text from Sonia . She tells him that she wants to go to the cinema with him . She attached a download link for a list of films which are playing at the local cinema . Clyde leaves the attic and downloads the link . Outside he meets Rani who has a blank face . Rani knows about the text from Sonia . Suddenly Clyde ' s mobile phone transforms into a locust and Clyde is attacked by it . In the meantime Mr Smith scans the neighbourhood and tells Luke that 58 other home invasions have occurred . There are more home invasions to come , Bannerman Road is the most effected by it . Mr Smith sends e - mails to the neighbourhood to warn the people about the download link . Through CCTV cameras Sarah and Luke watch how people are attacked by the locusts . A man flees with his twin daughters to Carlton Road . Then the locusts reached High Street . People flee from the internet café onto the street . On Bannerman Road blank faced people keep marching out of the houses and walk together down the street . Sarah realises that Rani and Clyde are not themselves . She tells them to shake the external control , under which they are , of . Clyde threatens Sarah that if she won ' t stop the investigation she will become one with the Umorgus . Then Rani and Clyde leave . Mr Smith finds out the true source of the downloads and tells Sarah Jane that Ian Webster is responsible for this . Sarah and Luke go to Stone and Parsons , the firm where Ian works . There are a lot of people at the firm who are controlled by the locusts , Rani and Clyde are two of them . Sarah and Luke find out that Ian Webster is working together with the Umorgus . The Umorgus wanted to invade Earth . They found Ian Webster who felt bad , because he was bullied since his childhood . At first it were the people at Bannerman Road , where he lived as a child . As a grown up he was bullied by his colleagues at Stone and Parsons . Ian wanted to take revenge and when the Umorgus asked him to work together to take control of his bullies Ian agreed to do so . Ian doesn ' t realise that the Umorgus want to control the whole world . He enjoys having control over his colleagues and being able to tell them what they need to do . He threats them as his slaves . Suddenly Sarah speaks to Ian and tells she can understand how he feels , but that he can do so much good and that he is ruining his life only for revenge . Then Ian introduces Sarah to the Umorgus . The Umorgus tells her that through the computer virus and the locus he can control the whole world . It ' s the first time that Ian hears about the Umorgus real plans . Then the Umorgus takes control of Ian . He orders him to send the virus through the whole world . After this the Umorgus wants to eat Sarah . Meanwhile , Luke gets to the main computer of the building and hacks into its system . Suddenly an alarm sound can be heard in the whole building . Luke creates an emergency lock down and cuts down all external communication . The virus can ' t be sent through the world . The Umorgus tells his slaves to get into the security and catch Luke . Ian tries to contact several other slaves in other parts of the building , but Sarah Jane uses her sonic lipstick on Ian ' s headset . A loud shrill sound can be heard all over the building . The personalities of the people return , the Umorgus looses his control over them . The deactivated locusts fall from the people ' s clothes . Ian gets up and tells the Umorgus that if he had known about his true intentions , he would never have helped the Umorgus . The Umorgus then leaves Earth . Ian is arrested by the police . The police thinks that only Ian is responsible for the chaos and that he caused it with a computer virus . They don ' t know about the involvement of the Umorgus . Luke , Rani , Clyde and Sarah go back home and they see the first few snow flakes of the year . To them it ' s like a reward for defeating the Umorgus . Meanwhile , Oli is playing football with his friends and Doris is going to an organised speed dating . Notes . " to be added " Continuity . " to be added "