 His review focused primarily upon the Daleks . He initially criticised their appearance because of overuse ; he discussed their previous appearances in Doctor Who since 2005 : a singular enemy in " Dalek " ; a Dalek empire against Rose in " The Parting of the Ways " ; the Dalek Cult of Skaro against the Cybermen in " Doomsday " ; and their appearance in 1930s Manhattan in " Daleks in Manhattan " and " Evolution of the Daleks " . He cited Davros and the " year @-@ and @-@ a @-@ half " break as the reason their appearance " sort @-@ of worked " ; Davros ' appearance " [ upped ] the stakes " , but he criticised the character for " [ doing ] little to enhance the mythology " and Bleach for a " way over the top " performance . <unk> criticised Rose 's isolation from the other companions , but noted that she could defend against the Daleks on her own . He closed his review positively ; he said " Whatever the conclusion of this season , Davies run on this series is an enormous achievement . " 
