Prisoner Zero

Prisoner Zero was a prisoner of the Atraxi.

History
Prisoner Zero was a captive of an Atraxi extra-dimensional prison. When a crack in the universe opened into Amelia Pond's house on Earth, it was able to escape. Prisoner Zero hid within a room in Amelia's house, placing a perception filter on the door to the room so that it would never be found. There, it hid for twelve years, sometimes venturing out into the village, posing as people who it had established a psychic link with, a process that took months. Since the forms it took were of comatose people, Rory Williams, who worked at the local hospital as a nurse, took pictures of them with his BlackBerry Storm, knowing that the people he saw shouldn't be up and about. It was during this time that Prisoner Zero established a Psychic link with Amelia (later Amy) Pond.

The Doctor belatedly returned to Amelia's house to save her from the Multi-form. After Amy had seen its natural form, Prisoner Zero took a shape-shifted form but was confused as to which voice to use for each form. The Atraxi, who had followed the Doctor, broadcast a global warning that they would incinerate "the human residence", Earth, if Prisoner Zero did not surrender. After escaping from Prisoner Zero, the Doctor and Amy went into the village square, where residents of Leadworth were taking pictures of the Sun, obscured because the Atraxi had put a force field around the Earth. The Doctor noticed that Rory was facing the other way, taking a picture of Prisoner Zero, who was disguised as a man with a dog. The Doctor attempted to draw the Atraxi to Prisoner Zero by overloading all the electrical devices in the surrounding area with his extraterrestrial sonic screwdriver, but the screwdriver burnt out and Prisoner Zero escaped again.

Prisoner Zero arrived at the hospital and proceeded to kill all the doctors and nurses. It then took the form of a woman with two children to fool Amy and Rory, but gave itself away by talking with the woman's voice through a child's mouth. It snarled at Amy and Rory and chased them down the corridors. The Doctor arrived through the window just in time, and revealed his master plan to Prisoner Zero.

Believing that surrender would mean execution, Prisoner Zero said it was prepared to die in flames with the whole planet. The Doctor suggested Prisoner Zero open another crack to escape, but Zero replies the cracks were not its doing, but cracks in the skin of the universe, and taunted the Doctor over his lack of knowledge before warning "The Pandorica will open. Silence will fall". When cornered by the Doctor, who had given the Atraxi its location and pictures of all its previous disguises, it tried to avoid Atraxi detection by using a psychic connection with Amy and using her memories to imitate her younger self and the Doctor. The Doctor thwarted this by stimulating Amy's recent memory of Prisoner Zero and forcing it to take on its own form. The Atraxi detected and secured Prisoner Zero, as it gave its final warning: "Silence, Doctor. Silence will fall" (DW: The Eleventh Hour).


 * If the Cracks in time were negated by the Doctor rather than simply closing, it is possible that Prisoner Zero never escaped from its prison. (DW: The Big Bang)

Behind the scenes

 * In an issue of Doctor Who Magazine, Matt Smith and Karen Gillan referred to Prisoner Zero as a "Face Tendril". Steven Moffat also referred to it as such.
 * Despite being the first villain of the Matt Smith era, Prisoner Zero wasn't seen in any trailers or publicity images.
 * It is unknown what crimes caused Prisoner Zero to be imprisoned.
 * Prisoner Zero's entire body is never seen, always trailing off-screen.