<page_title> List of Torchwood episodes </page_title> <section_title> Series 2 (2008) </section_title> <table> <cell> 2 <col_header> No. in series </col_header> <row_header> 15 </row_header> </cell> <cell> "Sleeper" <col_header> Title </col_header> <row_header> 15 </row_header> </cell> <cell> 23 January 2008 <col_header> Original air date </col_header> <row_header> 15 </row_header> </cell> </table>
"Sleeper" is the second series of Torchwood, and was aired on 23 January 2008.