<page_title> The Flash (season 3) </page_title> <section_title> Episodes </section_title> <table> <cell> "Invasion!" <col_header> Title </col_header> <row_header> 54 </row_header> </cell> <cell> 4.15 <col_header> U.S. viewers (millions) </col_header> <row_header> 54 </row_header> </cell> </table>
The Flash episode "Invasion!" had a viewership of 4.15 million viewers.