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:
Sam Underwood
Table title:
Theatre
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year(s) </th><th colspan=1 rowspan=1 > Title </th><th colspan=1 rowspan=1 > Role </th><th colspan=1 rowspan=1 > Director(s) </th><th colspan=1 rowspan=1 > Location </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2010 </td><td class="highlighted"  colspan=1 rowspan=1 > Candida </td><td class="highlighted"  colspan=1 rowspan=1 > Marchbanks </td><td colspan=1 rowspan=1 > Tony Walton </td><td class="highlighted"  colspan=1 rowspan=1 > Irish Repertory Theatre </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2010 </td><td class="highlighted"  colspan=1 rowspan=1 > Equus </td><td class="highlighted"  colspan=1 rowspan=1 > Alan Strang </td><td colspan=1 rowspan=1 > Tony Walton </td><td class="highlighted"  colspan=1 rowspan=1 > John Drew Theater at Guild Hall </td></tr>
<tr> <td colspan=1 rowspan=1 > 2010 </td><td colspan=1 rowspan=1 > Veritas </td><td colspan=1 rowspan=1 > Lumbard </td><td colspan=1 rowspan=1 > Ryan J. Davis </td><td colspan=1 rowspan=1 > HERE Arts Center </td></tr>
<tr> <td colspan=1 rowspan=1 > 2011 </td><td colspan=1 rowspan=1 > Hamlet </td><td colspan=1 rowspan=1 > Hamlet </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > theSpace on the Mile, Edinburgh Festival </td></tr>
<tr> <td colspan=1 rowspan=1 > 2012 </td><td colspan=1 rowspan=1 > The Picture of Dorian Gray </td><td colspan=1 rowspan=1 > Dorian Gray </td><td colspan=1 rowspan=1 > Quin Gordon </td><td colspan=1 rowspan=1 > The Pershing Square Signature Center </td></tr>
</table>
Question:
In which Tony Walton-directed plays did Sam Underwood appear?
Answer:
Sam Underwood appeared as Marchbanks in Candida and Alan Strang in Equus, both directed by Tony Walton.