Bonnie ( The Zygon Invasion ) Bonnie was the name taken by the Zygon leader of Truth or Consequences , a radical group of young Zygons that opposed Operation Double ; feeling Zygons should be free to who they really were instead of being forced to hide as humans . Taking the form of the Doctor ' s companion Clara , Bonnie attempted to manipulate him into deathtraps , but failed miserably . Eventually , she ended up in a stand - off with Kate Stewart with the Osgood Box es . In the end , the Doctor managed to help Bonnie see that she wanted nothing more than a senseless cycle of violence ; it was better to protect others and try keeping other lunatics from killing . Taking this new purpose to heart , Bonnie decided to take the vacant spot left by the Osgood killed by Missy . Both of them promised the Doctor that they would reveal which of the Osgoods that Missy killed , but only when whether if it was the original or the Zygon doesn ' t matter anymore . Biography . She originally lived in one of the Zygon colonies , this particular one being located under Clara ' s block of flats . The Zygons kidnapped Clara , and Bonnie took on her form , pretending to be Clara while she went around England with Jac looking for more clues to the Zygon uprising . While Bonnie ( still in Clara ' s form ) led Jac and some UNIT soldiers into the Zygon colony , she dusted off the Zygon pods in which they were keeping the kidnapped human s . Jac quickly deduce d that Bonnie was not actually Clara and that it was the humans that were in the pods . Bonnie ordered her fellow Zygons to kill them . Later , overlooking the sea , Bonnie prepared to fire an FIM - 92 Stinger missile launcher at Boat One with the Twelfth Doctor and Osgood inside . The Doctor attempted to reason with her over the phone , but Bonnie , despite the Doctor ' s protests , fired a missile at the plane . ( TV : " The Zygon Invasion " ) Clara , maintaining a live feed to Bonnie from inside a Zygon pod , caused Bonnie to misfire her bazooka , allowing the Doctor and Osgood to escape . Bonnie later had some of her group murdered humans and sweep up their remains . She chased Etoine to his flat , knowing he was a Zygon . She broke into his home and told him that he would be the first to make the humans see them for who they were . Giving him a zap , Bonnie disrupted Etoine ' s shape - shifting ability , and recorded him turning back into a Zygon . She posted the video on the Internet . Bonnie remained unaware that this made Etonie commit suicide . Later , Bonnie was able to extract the location of the Osgood Box inside the Black Archive from Clara ' s mind . Both Bonnie and Kate were ready to set off the Osgood Box . The Doctor intervened by using the horrific memories of his actions during the Time War and that the agony allows him to not see any more suffering . After the Doctor convinced Bonnie to not set off the Osgood Box , which was actually empty , Bonnie also assumed Osgood ' s form and acted as the second protector of Earth alongside the other surviving Osgood . She felt that they were a credit to both humans and Zygons and planned to take on the role of protecting the Earth from threats . ( TV : " The Zygon Inversion " ) Personality . Bonnie was mentally unstable and seemed to suffer from emotional suppression . She often bottled up her feelings , resulting in a calm and cold demeanour but also had an explosive temper . She was smug and sadistic , saying that she was looking forward to hearing Clara scream ( TV : " The Zygon Inversion " ) and smiling as she watched her fellow Zygons murder Jac and her soldiers . ( TV : " The Zygon Invasion " ) Bonnie seemed to consider murder and war to be a game and was eager to cause bloodshed . ( TV : " The Zygon Inversion " ) However , Bonnie was also childish and when angry , she had a tendency to smash things . Her childishness was also shown when the Doctor pointed out that she didn ' t actually know what she wanted to do if she took over the world . Having not actually thought that far ahead , Bonnie was unsure how to respond and the Doctor managed to talk her out of starting a war by telling her he forgave her . Bonnie felt remorseful and couldn ' t understand how the Doctor could forgive her . Feeling she had to try and make up for her crimes , Bonnie became Osgood ' s " sister " and decided to help her protect the Earth . ( TV : " The Zygon Inversion " )