Mother (The Eleventh Hour)
From Tardis Wiki, the free Doctor Who reference
This mother was a resident of Leadworth with two children. She was in a coma in the Royal Leadworth Hospital. Prisoner Zero used her image to walk around the village. When Amy and Rory got to the coma ward in the Royal Leadworth Hospital, she approached them, with two children, and she said, "Dr Ramsden's dead, and so are the nurses". Then one of the children spoke in her voice, and Amy and Rory realised that she was Prisoner Zero in disguise. Prisoner Zero then changed the image to Amy, when the Doctor threatened to show the Atraxi the different disguises of Prisoner Zero. (DW: The Eleventh Hour)
