<page_title> Holby City (series 12) </page_title> <section_title> Episodes </section_title> <table> <cell> 1 June 2010 <col_header> Original air date </col_header> <row_header> 508 </row_header> </cell> <cell> 4.28 <col_header> Viewers (millions) </col_header> <row_header> 508 </row_header> </cell> </table>
The lowest ratings occurred on 1 June 2010, when Holby City was watched by 4.28 million.