Doctor Who The Witch's Familiar (2011)

Clara and Missy are outside the Dalek city. Missy had rigged their vortex manipulators to make them appear to have died from the Dalek attack, a trick she learned from the Doctor; however, the manipulators have been destroyed. They make their way in through a sewer, which contains a number of decaying and insane Dalek mutants. They capture a Dalek using the mutants in the sewer and steal its casing, which Missy convinces Clara to enter to help them re-enter the city. Once inside, Clara finds any spoken expression of emotion or individual identity is translated into only "Exterminate!" or "I am a Dalek". Once they access the city, Missy abandons Clara