The new paradigm Daleks exterminated their "inferior" counterparts. I can only assume the old school Daleks knew of their fate given a total lack of resistance.
That being the case, if all Daleks from Journey's End were derived from Davros, how are they inferior? I must have missed a line...
That being the case, if all Daleks from Journey's End were derived from Davros, how are they inferior? I must have missed a line...