Sky ( TV story ) Sky was the first story of the fifth series of " The Sarah Jane Adventures " . It introduced Sky Smith , who would later become the adoptive daughter of Sarah . Like all of series 5 , it was actually filmed as a part of series 4 , roughly a year before its broadcast . This production scheduling allowed for the episode to be completed and broadcast after the death of Elisabeth Sladen . Although the story introduced a new regular character , it also contained the last appearances of Gita Chandra , Professor Celeste Rivers and the Shopkeeper . Due to the unexpected end of production , none of these characters were given a narrative conclusion ; " Sky " is merely their final story . Synopsis . Sarah , Clyde and Rani try to figure out why a baby abandoned on Sarah ' s doorstep is undergoing rapid maturation , and how she ' s connected to a war between the Metalkind and the Fleshkind . Plot . Part 1 . In the attic , Sarah Jane Smith watches the star - filled sky with her telescope , narrating the wonderful things she has seen . A seeming meteor approaches Earth and crashes in a junkyard . A homeless person witnesses this and sees a metalloid figure emerge , scan the area and then make itself invisible . Back in the attic , Sarah speaks via the computer to her son , Luke Smith , with her friends Clyde Langer and Rani Chandra . Sarah misses her son but Rani comforts her , saying Luke will be back soon and that Sarah should make the most of her peace and quiet . Very early next morning , Sarah is awoken by the doorbell . She finds a baby girl on her doorstep . When the baby cries , every light bulb on Bannerman road burst . Rani is woken later by a text from Sarah saying to come right away . Rani reports to Sarah that all of the light bulbs on Bannerman Road have gone out . Sarah reveals to Rani and Clyde , who appears later , that the child is an alien . Clyde feeds the baby milk , calming her down . Meanwhile at a power plant , an orb of energy appears and an attractive woman walks out . She confronts a fallen worker , introducing herself as Miss Myers . She is looking for her child . She hypnotises the fallen worker , putting the rest of the power plant personnel into an unconscious state . Miss Myers learns that her daughter is at Bannerman Road and heads there . Gita Chandra encounters Sarah and the others with the baby . She assumes that Sarah has begun taking in foster children , an idea which the others go along with , calling the baby Sky ( as she essentially " fell out of the sky " ) . Gita then tells them about the meteor which that fell the previous night . Sarah and Rani go to investigate . With Professor River ' s help and the eyewitness account of the homeless man , they discover that the metalloid alien is headed for Bannerman Road . Clyde is babysitting Sky when the alien attacks them . Clyde and Sky are rescued by Miss Myers and taken to the power plant . Miss Myers tells Clyde a little of " Sky ' s " purpose . Clyde is suspicious of Miss Myers , and runs away with Sky . He evades Miss Myers and her henchmen while Sarah and Rani break into the plant . They reunite with Clyde and Sky . The metal alien arrives and corners them . It reveals that the baby is a weapon . The child begins a metamorphosis . Myers is delighted that the weapon is " priming " itself ; an energy aura surrounds Sky and she becomes a pre - teen . . . Part 2 . Sky , having just transformed , launches a powerful jolt of electricity at the metal alien , sending it crashing into the wall . Miss Myers encourages Sky to finish off the Metalkind but Sky is scared and confused until she is comforted by Sarah . Miss Myers reveals that she created Sky . The Bannerman Road gang escape with Sky to Sarah ' s house , where Mr Smith can scan her . He determines that Sky was created to be a bomb to destroy the whole Metalkind species across the entire universe , killing Sky in the process . Rani tells Sky of Sarah adopting Luke and about what it is to be a girl . Sky learns of her purpose and with the Bannerman Road gang returns to the power plant , as Miss Myers is the only person who can " defuse " Sky . They break in again and Sarah confronts Miss Myers alone , leaving Sky at the car with Rani and Clyde . Myers is a member of the the Fleshkind species , who have been locked in war with the Metalkind for centuries . The Metalkind that was injured has been hooked up to the power plant . Myers plans to have it summon the entire Metalkind species , so Sky can destroy them all . Miss Myers tells Sarah that she will be forced to hand over Sky to save Earth from the cruelty of the Metalkind , who have vowed to destroy all Fleshkind . The injured Metalkind tells Sarah that the Fleshkind invaded his home planet and mined the ore , which was actually the Metalkind children . Myers is determined that Sky fulfil her destiny . Sky believes that she should fulfil her purpose to save Earth from the oncoming Metalkind army , even if it means dying , and runs from the others to confront the Metalkind . Sarah Jane goes after her , tasking Clyde and Rani to shut down the power , thus closing the portal which the Metalkind will use to come to Earth . Rani and Clyde find a room in the power plant where they begin to manually shut down the power . Sarah finds Sky and tries to convince her that she doesn ' t have to sacrifice herself and destroy the Metalkind . Sky is fully primed and ready to " fulfil her purpose " when Clyde and Rani succeed in deactivating the power in the plant ( and Bannerman Road as well ) . Sky absorbs the energy of the portal and collapses . She revives , and reports that she feels different . Myers confirms that Sky is different , and her genetic programming has been altered . She is no longer a weapon . Miss Myers says that she has lost her daughter . The Metalkind breaks free , grabs Myers and uses her own pendant to teleport them both away from Earth . The gang return to Bannerman Road . Gita is confused , seeing Sky now much older than the baby she saw Sarah with earlier , but Sarah explains that there was a mix - up at the foster agency with the " other Sky " . This girl — now called Sky Smith — will be staying for awhile . Sarah and Sky go to the attic and are surprised to see Captain and the Shopkeeper . They were the ones who left Sky on Sarah ' s doorstep ; the young girl would be safe with the former time - traveller . It is the Shopkeeper ' s task to put things in the right place as a " servant of the Universe " . Sky expresses her desire to stay with Sarah , and the Shopkeeper agrees . He tells Sarah she will find out who he is in good time , then teleports away with Captain , leaving Sarah confused just like last time . Sarah offers Sky pizza but the young girl is unaware of what it is . Story notes . Ratings . " to be added " Filming locations . " to be added " Production errors . " to be added " Home video releases . DVD releases . " to be added " Blu - ray releases . " to be added "