Drone 77, formerly a human male, was the designation of the drone partner of Drone 69, formerly a human female. These drones were tested genetically by Davros, who modified their brains to remove his emotions of compassion, love and pity; as such, these drones were, like the Daleks, Davros' children. As the Daleks continued their bombardment of the Earth colony of Phobos, the two drones were questioned by Davros. When they behaved in a fashion indicating disgust for him, both moving away when he went to touch them, and demonstrated fear by seeking comfort in each other's arms, Davros ordered their extermination. As he left, he wondered if the same behaviour that he so despised also existed in the Daleks. (PROSE: An Incident Concerning the Continual Bombardment of the Phobos Colony)

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