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:
In the Flesh (TV series)
Table title:
Season 1
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > # </th><th colspan=1 rowspan=1 > Title </th><th colspan=1 rowspan=1 > Directed by </th><th colspan=1 rowspan=1 > Written by </th><th colspan=1 rowspan=1 > Original air date </th><th colspan=1 rowspan=1 > UK viewers </th></tr>
<tr> <th colspan=1 rowspan=1 > 1 </th><td class="highlighted"  colspan=1 rowspan=1 > "Episode 1" </td><td colspan=1 rowspan=1 > Jonny Campbell </td><td colspan=1 rowspan=1 > Dominic Mitchell </td><td colspan=1 rowspan=1 > 17 March 2013 </td><td class="highlighted"  colspan=1 rowspan=1 > 668,000 </td></tr>
<tr> <td colspan=7 rowspan=1 > Kieren Walker, one of thousands of individuals affected by Partially Deceased Syndrome (PDS), returns home to Roarton. He has been subjected to months of rehabilitation and medication at a special, defended unit, specifically designed to keep the PDS sufferers in. </td></tr>
<tr> <th colspan=1 rowspan=1 > 2 </th><td colspan=1 rowspan=1 > "Episode 2" </td><td colspan=1 rowspan=1 > Jonny Campbell </td><td colspan=1 rowspan=1 > Dominic Mitchell </td><td colspan=1 rowspan=1 > 24 March 2013 </td><td class="highlighted"  colspan=1 rowspan=1 > 392,000 </td></tr>
<tr> <td colspan=7 rowspan=1 > Kieren feels trapped at home and escapes to his grave, where he is reunited with his old hunting partner Amy Dyer—who persuades him to take a dangerous day trip. </td></tr>
<tr> <th colspan=1 rowspan=1 > 3 </th><td colspan=1 rowspan=1 > "Episode 3" </td><td colspan=1 rowspan=1 > Jonny Campbell </td><td colspan=1 rowspan=1 > Dominic Mitchell </td><td colspan=1 rowspan=1 > 31 March 2013 </td><td class="highlighted"  colspan=1 rowspan=1 > 525,000 </td></tr>
<tr> <td colspan=7 rowspan=1 > Kieren visits the supermarket where he used to hunt, which brings back memories of when Jem spared his life. The siblings then confront their past issues and drop in to see the Lancasters, parents of a girl he killed. </td></tr>
</table>
Question:
How was the viewing number of the first episode of the Flesh series as compared to the 2nd and 3rd?
Answer:
In the Flesh (TV series) was watched by 525,000 viewers, an increase from the previous episode but still not as high as Episode 1.