Original: They would later appear in the two-part story "Daleks in Manhattan"/"Evolution of the Daleks", in which whilst stranded in 1930’s New York, they set up a base in the partially built Empire State Building and attempt to rebuild the Dalek race.
Simplified: 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.