Supreme Dalek (Victory of the Daleks)

A Supreme Dalek served as second-in-command to the Prime Minister 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. It informed the Doctor of the alias the Daleks use to refer to him, "the Predator," and some of the information regarding their mission to the Dalek Asylum. Just as the Parliament was about to destroy it, Oswin Oswald removed any memory of the Doctor from the Daleks' Pathweb from the centre of the Asylum, causing the Supreme Dalek, along with all other members of the Parliament, to forget the Doctor entirely. (TV: Asylum of the Daleks)

The Daleks would later remember the Doctor at Trenzalore. (TV: Time of the Doctor)