Strategist Dalek (Asylum of the Daleks)
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A Strategist Dalek was part of the Parliament of the Daleks that made a request to the Eleventh Doctor, Amy Pond and Rory Williams to save the Daleks from the Dalek Asylum. Just as the Parliament was about to destroy the Asylum, Oswin Oswald removed any memory of the Doctor from the Daleks' Pathweb from the centre of the Asylum, causing the Strategist Dalek, along with all other members of the Parliament, to forget the Doctor entirely. (TV: Asylum of the Daleks)
