page_title: Cold Blood (Doctor Who)
section_title: Plot
hierarchical_section_title: Cold Blood (Doctor Who) / Plot
caption_attribution_description: From the episode Cold Blood. Science of the Time Lords event at the National Space Centre, 16th November 2013. Doctor Who Experience
context_page_description: "Cold Blood" is the ninth episode in the fifth series of British science fiction television series Doctor Who, which was first broadcast on 29 May 2010 on BBC One. It was written by Chris Chibnall and directed by Ashley Way. It is the second episode of a two-part story, the first episode being "The Hungry Earth", which features the return of the reptilian humanoid Silurians.
  Continuing from the previous episode, alien time traveller the Doctor and geologist Nasreen Chaudhry have taken the TARDIS deep below the ground to the Silurian city where the Doctor's companion Amy Pond, a local man named Mo, and Mo's son, Elliot, are being held hostage. Meanwhile, above ground, Amy's fiancé, Rory; Mo's wife, Ambrose; and Ambrose's father, Tony, keep watch over Alaya, a captured Silurian who is the key to freeing the hostages. While the Doctor leaves Amy and Nasreen to negotiate sharing the planet with the Silurians, to help Mo find his son Eliot, it is revealed that Restac's sister Alaya has been killed by Ambrose on the surface.
  Chibnall was elected by executive producers Steven Moffat and Piers Wenger to write a two-part episode about the return of the Silurians.
context_section_description: Deep under the Earth, Amy and Mo escape from Silurian doctor Malohkeh's experimentation and Mo discovers his son, Elliot, sedated in a chamber and under observation. The leader of the Silurian warrior caste, Restac, insists both the Eleventh Doctor and geologist Nasreen Chaudhry be executed and escorts them to a Silurian court; though Amy and Mo interrupt the trial with stolen weapons, they too are captured. Eldane, Restac's superior, is called in by Malohkeh and demands a halt to the hostilities.
  The Doctor makes contact with Rory; Mo's wife, Ambrose; and Ambrose's father, Tony, reminding them to keep their captive Silurian, Restac's sister Alaya, alive. They are unaware that Ambrose has already killed Alaya because she would not help Tony, whom she had infected with Silurian venom. The Doctor arranges a conference between Eldane, Amy, and Nasreen; the three discuss how humans and Silurians can co-exist on the surface. Ambrose and Tony, worried about the Silurian reaction when they discover Alaya's death, set Nasreen and Tony's drill to burrow into the oxygen pockets of the Silurians' underground city fifteen minutes after they depart, which would destroy it.
  Meanwhile, Restac has killed Malohkeh for his betrayal and awakened other members of the warrior caste, intending to stage a coup against Eldane. The Doctor escapes with the humans and channels an energy pulse to the base of the drill before it impacts the city. Eldane returns the warriors to hibernation by initiating a "toxic fumigation"; the humans escape, and Eldane hopes that in a thousand years, peace between humans and Silurians can occur. Tony, still affected by Silurian venom, opts to stay behind to be cured, and Nasreen stays with Tony.
  The Doctor, Amy and Rory find a crack in the cavern wall similar to those they have seen before. The Doctor surmises that the crack was caused by an explosion in time, which might have left shrapnel behind. He reaches in and pulls out an object which he wraps in a handkerchief. Restac, dying from the toxic exposure, crawls around the corner and fires at the Doctor, but Rory pushes him out of the way and takes the shot, dying in Amy's arms. The crack absorbs Rory's body, erasing him from existence and causing Amy to lose her memory of him. Returning to the surface, the Doctor takes out the object he pulled from the crack--a burned piece of the TARDIS's sign.
caption: The TARDIS fragment prop used at the end of this episode, on display at an exhibition.
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