Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Gruen (TV series)
Table title:
Season 5 (2012)
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > No. overall </th><th colspan=1 rowspan=1 > No. in season </th><th colspan=1 rowspan=1 > Topic(s) </th><th colspan=1 rowspan=1 > Original air date </th><th colspan=1 rowspan=1 > Viewers </th></tr>
<tr> <th colspan=1 rowspan=1 > 53 </th><td class="highlighted"  colspan=1 rowspan=1 > 1 </td><td class="highlighted"  colspan=1 rowspan=1 > Gruen Sweat (2012 Summer Olympics) </td><td class="highlighted"  colspan=1 rowspan=1 > 25 July 2012 </td><td class="highlighted"  colspan=1 rowspan=1 > 931,000 </td></tr>
<tr> <th colspan=1 rowspan=1 > 54 </th><td class="highlighted"  colspan=1 rowspan=1 > 2 </td><td class="highlighted"  colspan=1 rowspan=1 > Gruen Sweat (2012 Summer Olympics) </td><td colspan=1 rowspan=1 > 1 August 2012 </td><td colspan=1 rowspan=1 > 793,000 </td></tr>
<tr> <th colspan=1 rowspan=1 > 55 </th><td class="highlighted"  colspan=1 rowspan=1 > 3 </td><td class="highlighted"  colspan=1 rowspan=1 > Gruen Sweat (2012 Summer Olympics) </td><td colspan=1 rowspan=1 > 8 August 2012 </td><td colspan=1 rowspan=1 > 794,000 </td></tr>
<tr> <th colspan=1 rowspan=1 > 56 </th><td class="highlighted"  colspan=1 rowspan=1 > 4 </td><td class="highlighted"  colspan=1 rowspan=1 > Gruen Sweat (2012 Summer Olympics) </td><td colspan=1 rowspan=1 > 15 August 2012 </td><td colspan=1 rowspan=1 > 918,000 </td></tr>
<tr> <th colspan=1 rowspan=1 > 57 </th><td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 > Crown Casino </td><td colspan=1 rowspan=1 > 22 August 2012 </td><td colspan=1 rowspan=1 > 906,000 </td></tr>
<tr> <th colspan=1 rowspan=1 > 58 </th><td colspan=1 rowspan=1 > 6 </td><td colspan=1 rowspan=1 > Doug Pitt </td><td colspan=1 rowspan=1 > 29 August 2012 </td><td colspan=1 rowspan=1 > 810,000 </td></tr>
<tr> <th colspan=1 rowspan=1 > 59 </th><td colspan=1 rowspan=1 > 7 </td><td colspan=1 rowspan=1 > Lance Armstrong </td><td colspan=1 rowspan=1 > 5 September 2012 </td><td colspan=1 rowspan=1 > 917,000 </td></tr>
<tr> <th colspan=1 rowspan=1 > 60 </th><td colspan=1 rowspan=1 > 8 </td><td colspan=1 rowspan=1 > "IheartRine..." </td><td colspan=1 rowspan=1 > 12 September 2012 </td><td colspan=1 rowspan=1 > 939,000 </td></tr>
<tr> <th colspan=1 rowspan=1 > 61 </th><td colspan=1 rowspan=1 > 9 </td><td colspan=1 rowspan=1 > People smuggling </td><td colspan=1 rowspan=1 > 19 September 2012 </td><td colspan=1 rowspan=1 > 946,000 </td></tr>
<tr> <th colspan=1 rowspan=1 > 62 </th><td colspan=1 rowspan=1 > 10 </td><td colspan=1 rowspan=1 > iPhone 5 </td><td colspan=1 rowspan=1 > 26 September 2012 </td><td colspan=1 rowspan=1 > 913,000 </td></tr>
<tr> <th colspan=1 rowspan=1 > 63 </th><td colspan=1 rowspan=1 > 11 </td><td colspan=1 rowspan=1 > Alan Jones </td><td colspan=1 rowspan=1 > 3 October 2012 </td><td colspan=1 rowspan=1 > 1,023,000 </td></tr>
<tr> <th colspan=1 rowspan=1 > 64 </th><td colspan=1 rowspan=1 > 12 </td><td colspan=1 rowspan=1 > Church of Scientology </td><td colspan=1 rowspan=1 > 10 October 2012 </td><td colspan=1 rowspan=1 > 997,000 </td></tr>
<tr> <th colspan=1 rowspan=1 > 65 </th><td colspan=1 rowspan=1 > 13 </td><td colspan=1 rowspan=1 > Newspapers </td><td colspan=1 rowspan=1 > 17 October 2012 </td><td colspan=1 rowspan=1 > 1,018,000 </td></tr>
<tr> <th colspan=1 rowspan=1 > 66 </th><td colspan=1 rowspan=1 > 14 </td><td colspan=1 rowspan=1 > Red Bull Stratos </td><td colspan=1 rowspan=1 > 24 October 2012 </td><td colspan=1 rowspan=1 > 1,038,000 </td></tr>
</table>
Question:
When did the Gruen Sweat (2012 Summer Olympics) series air and how many people watched it?
Answer:
The four episode series premiered on 25 July 2012 to 931,000 viewers.