The two-part story `` Daleks in Manhattan '' \/ `` Evolution of the Daleks '' revealed they had escaped to 1930 New York , setting up base in the Empire State Building .
They would later appear in the two-part story `` Daleks in Manhattan '' \/ `` Evolution of the Daleks '' , in which whilst stranded in 1930s New York , they set up a base in the partially built Empire State Building and attempt to rebuild the Dalek race .