Thalek (Brotherhood of the Daleks)

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You may be looking for Thalek (Auld Mortality).

Thaleks was a term coined by Charlotte Pollard to describe the Daleks that believed themselves to be other inhabitants of Skaro, the Thals. The Thal-Daleks along with a Red Dalek were destroyed when the facility collapsed when Jesic used the word exterminate. (AUDIO: Brotherhood of the Daleks)