Androparg Androparg was a Talerian who spearheaded an attempted invasion of Earth . ( PROSE : " Apollo 23 " ) History . When Professor Jackson began working on turning prisoners into Blanks as part of his plan to replace their minds with those of the dying , he was unaware that his equipment was giving off a signal to the Talerian s that Androparg was able to follow to Base Diana on Earth ' s Moon . Androparg arrived while Jackson was setting up the process equipment for the first tests and was able to enter Jackson ' s body and possess the scientist . Though Androparg was able to enter Jackson ' s body , it took him some time to suppress Jackson ' s consciousness fully and some mistakes were made . After gaining control of Jackson fully , Androparg made a back - up copy of his consciousness , but kept the real Jackson alive inside of himself so that he could access Jackson ' s memories and emotions to properly pose as him rather than erasing the original Jackson ' s mind . Androparg then continued Jackson ' s process of turning people into Blanks , but instead of replacing them with human consciousness ' s , Androparg replaced them with Talerian ones as a preface to an invasion of Earth so the Talerians could upload their minds into the bodies of humanity to replace their own frail forms . A failed early attempt was Liz Didbrook who Androparg successfully downloaded a Talerian consciousness into , but the process failed to complete and Liz remained in control with an alien mind within her , driving Liz insane . Early on , Androparg was able to transfer a Talerian mind into Nurse Phillips to aid him in his efforts . As well as using Blanks for hosts , Androparg turned Blanks who had not yet received a Talerian consciousness into effective puppets by restoring their original personality that would be deactivated to follow a set of programed instructions after which the original personality would return with no memory of what they did . Eventually , Liz Didbrook sabotaged the quantum displacement equipment while Marty Garrett was outside of Base Diana , causing him to end up in a shopping centre instead of Base Hibiscus . As Liz had hoped , this drew attention , specifically from the Eleventh Doctor and Amy Pond . While the Doctor and Amy were observing the use of the process equipment , Jackson managed to regain control from Androparg long enough to transfer some of his memories to Prisoner Nine to attempt to warn the Doctor . The attempt failed ultimately due to Nurse Phillips quickly killing Prisoner Nine . While the Doctor was attempting to repair the quantum displacement equipment , Androparg chose to have it destroyed for good to cut the connection with Earth until everything was ready . Due to the Doctor ' s Time Lord biology he managed to survive and reach Base Hibiscus where " Apollo 23 " was launched to return the Doctor to the Moon to stop the invasion . At the same time , following some clues from Liz , Amy discovered the truth about the Blanks and the invasion . Though she attempted to enlist the aid of Captain Jim Reeve , he was under Talerian control and turned her over to Androparg . Unknown to the Talerians , an attempt to implant a Talerian mind into Major Andrea Carlisle had partially failed due to a power failure at a critical moment , leaving Carlisle with a Talerian mind within her but with Carlisle ' s own mind in control . Though Carlisle attempted to help Amy escape , she failed and Androparg turned her into a Blank . After a failed attempt to use a Blanked Marty Garrett to kill the Doctor , Androparg made it look like Amy had managed to escape capture in an attempt to learn the Doctor ' s plans to stop him . By this point , nearly all of Base Diana was either Blanks or under the control of Talerian minds . The Doctor quickly saw through Amy ' s Blanked state and was captured by an overconfident Androparg . However , the Doctor was able to escape with the help of Carlisle and retrieve the back - up of Amy ' s mind . After Amy ' s mind was restored when she drank her back - up , the Doctor was able to devise a plan to restore the personnel of Base Diana and defeat Androparg ' s plan . As part of the plan , Carlisle locked all of the base ' s doors open and made it so that the fire suppression system couldn ' t be turned off . As Reeve attempted to stop him , the Doctor activated the fire suppression system with which he had filled with water and the back - ups of everyone on Base Diana . This led to the erasure of the Talerian minds and Blank programing once the water touched everyone ' s skin and eventually for the effected personnel to regain their original consciousness ' s . While the Doctor ' s efforts restored everyone else back to normal , Androparg had removed Jackson ' s back - up from data storage at some point before the Doctor ' s return and remained unaffected . Seeing the effects of the Doctor ' s plan just as he was about to download a Talerian mind into Amy , Androparg retreated to Jackson ' s office where he signalled Taleria to send in a full invasion force . Androparg ' s invasion force was able to take control of Base Diana , trapping the personnel before he was confronted by the Doctor and Amy . Believing he ' d won , Androparg showed the two Jackson ' s back - up , telling them that the real Jackson ' s mind was completely suppressed by his and was at this point nearly gone though he still struggled with Androparg for control . As they talked , the Doctor made himself and Androparg a cup of tea , with Androparg not noticing the Doctor switching the phial with Jackson ' s back - up for an empty one and putting the back - up into Androparg ' s tea . As the Doctor announced that this wasn ' t a trap for the humans but rather the Talerians , Androparg realised too late what the Doctor had done . Ingesting Jackson ' s back - up destroyed Androparg ' s mind and allowed Jackson to regain control of his body with full knowledge of everything Androparg had done while controlling him . Remorseful for his role in the whole incident , Jackson used a Talerian gun to blow out the window in his office , blowing Jackson into space and killing him and anything that might ' ve remained of Androparg within him . The pressure change caused by Jackson ' s actions killed the Talerian invasion force and the Doctor was then able to dismantle Jackson ' s equipment , preventing any other Talerians from picking up where Androparg left off . ( PROSE : " Apollo 23 " )