<page_title> List of 30 Rock episodes </page_title> <section_title> Season 5 (2010–11) </section_title> <table> <cell> 89 <col_header> No. overall </col_header> <col_header> 81 </col_header> <col_header> 82 </col_header> <col_header> 83 </col_header> <col_header> 84 </col_header> <col_header> 85 </col_header> <col_header> 86 </col_header> <col_header> 87 </col_header> <col_header> 88 </col_header> </cell> <cell> 9 <col_header> No. in season </col_header> <row_header> 89 </row_header> </cell> <cell> "Chain Reaction of Mental Anguish" <col_header> Title </col_header> <row_header> 89 </row_header> </cell> </table>
"Chain Reaction of Mental Anguish" is the ninth episode of the 30 Rock fifth season and the 89th episode of the series.