<page_title> The Tonight Show </page_title> <section_title> Hosting history </section_title> <table> <cell> Conan O'Brien <col_header> Host </col_header> </cell> <cell> June 1, 2009 <col_header> Start date </col_header> </cell> <cell> January 22, 2010 <col_header> End date </col_header> </cell> <cell> 146 <col_header> Episodes </col_header> </cell> <cell> Jay Leno (second tenure) <col_header> Host </col_header> </cell> <cell> March 1, 2010 <col_header> Start date </col_header> </cell> <cell> February 6, 2014 <col_header> End date </col_header> </cell> </table>
O'Brien hosted 146 episodes over the course of less than eight months before Leno was brought back as host, where he served for almost four additional years.