Sirens of Ceres ( TV story ) Sirens of Ceres was the fifth episode of series 1 of " K9 " . K9 ' s role was smaller as this episode focused on other characters , in particular Jorjie . Synopsis . When Jorjie hits one of the robot police with a stone , her mother punishes her by sending her to the private school Magdalene Academy . But the Department are testing an alien mineral weapon , which they can use to control students in the academy . Plot . Vibeka , an activist , is protesting CCPC violence when she is apprehended by two of them . K9 , Starkey and Jorjie witness the arrest and Starkey records it to " publicise the violence " . Jorjie decides to take action and despite Starkey ' s warning she throws a stone at one of the CCPCs . The three run as Inspector Drake arrives and takes Vibeka away . Two CCPCs corner them and a third confiscates Starkey ' s recording . Drake orders the CCPCs to use an unknown device , the Inhibitor , into which the CCPC puts an alien substance . The device fails , destroying the CCPC and sending K9 flying . Drake is angered at this and crushes the top off his cane . At Jorjie ' s house , June is shocked to learn that Jorjie threw a stone at a CCPC . She is even angrier that Jorjie dismisses her concerns by complaining of a headache . Jorjie says the CCPC was using a strange weapon . Back at the mansion , Gryffen repairs K9 , and lectures Starkey on his " tomfoolery . " In the Department Mobile HQ , Drake suggests June send Jorjie to Magdalene Academy . Two weeks later . Jorjie arrives at the Academy , where she meets Vibeka , who warns Jorjie not to put on the bracelets worn by several of the students ; they change people ' s behaviour . Jorjie takes her advice and doesn ' t join Melaina ' s study group . When she goes to the mansion and complains about the school , Starkey and Gryffen don ' t agree with her . Gryffen analyses video playback of the explosion and finds the strange substance vaporises under pressure . K9 says the CCPCs used it to try to take control of him and it is an alien substance . When Jorjie returns to the academy , she finds Vibeka now wears a bracelet . She tells Starkey , who comes to Magdalene to investigate . Vibeka flirts with him . Gryffen discovers the alien substance is cerulium . K9 describes the planet Ceres , and how lack of free will destroyed its civilisation . At the Academy the girls give Jorjie a bracelet and persuade her to wear it . She falls under its influence almost immediately and returns to the mansion , where she flirts with Darius while K9 identifies the bracelet as cerulium . Starkey tells her to take off the bracelet , but she refuses until K9 destroys it with his laser cannon . The next day she returns to school with a fake bracelet , asking where she can get another one for her mother , June Turner . Drake realises that his plot is uncovered and the girls attack her , but K9 arrives and destroys all the bracelets . Melaina is the only one remaining . When Drake deactivates her , Jorjie reveals to the other students that she is a robot similar to the CCPC . Story notes . Ratings . " to be added " Myths . " to be added " Filming locations . " to be added " Home video releases . This episode is featured in the following DVD sets :