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:
Robert Knapp (actor)
Table title:
Filmography
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Title </th><th colspan=1 rowspan=1 > Role </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <td colspan=1 rowspan=1 > 1951 </td><td colspan=1 rowspan=1 > FBI Girl </td><td colspan=1 rowspan=1 > Lockwood </td><td colspan=1 rowspan=1 > Uncredited </td></tr>
<tr> <td colspan=1 rowspan=1 > 1951 </td><td colspan=1 rowspan=1 > Fixed Bayonets! </td><td colspan=1 rowspan=1 > Chuck </td><td colspan=1 rowspan=1 > Uncredited </td></tr>
<tr> <td colspan=1 rowspan=1 > 1952 </td><td colspan=1 rowspan=1 > Just This Once </td><td colspan=1 rowspan=1 > Elevator Operator </td><td colspan=1 rowspan=1 > Uncredited </td></tr>
<tr> <td colspan=1 rowspan=1 > 1952 </td><td colspan=1 rowspan=1 > Without Warning! </td><td colspan=1 rowspan=1 > Young Policeman </td><td colspan=1 rowspan=1 > Uncredited </td></tr>
<tr> <td colspan=1 rowspan=1 > 1952 </td><td colspan=1 rowspan=1 > Strange Fascination </td><td colspan=1 rowspan=1 > Jack </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1953 </td><td colspan=1 rowspan=1 > I Love Melvin </td><td colspan=1 rowspan=1 > Henneman Aide </td><td colspan=1 rowspan=1 > Uncredited </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1953 </td><td class="highlighted"  colspan=1 rowspan=1 > Mesa of Lost Women </td><td class="highlighted"  colspan=1 rowspan=1 > Grant Phillips </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1954 </td><td colspan=1 rowspan=1 > Silent Raiders </td><td colspan=1 rowspan=1 > Lt. Finch </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1955 </td><td colspan=1 rowspan=1 > The Long Gray Line </td><td colspan=1 rowspan=1 > Lieutenant </td><td colspan=1 rowspan=1 > Uncredited </td></tr>
<tr> <td colspan=1 rowspan=1 > 1956 </td><td colspan=1 rowspan=1 > Revolt at Fort Laramie </td><td colspan=1 rowspan=1 > Lt. Chick Waller </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1956 </td><td colspan=1 rowspan=1 > Jubal </td><td colspan=1 rowspan=1 > Jake Slavin </td><td colspan=1 rowspan=1 > Uncredited </td></tr>
<tr> <td colspan=1 rowspan=1 > 1956 </td><td colspan=1 rowspan=1 > Screaming Eagles </td><td colspan=1 rowspan=1 > Co-Pilot </td><td colspan=1 rowspan=1 > Uncredited </td></tr>
<tr> <td colspan=1 rowspan=1 > 1956 </td><td class="highlighted"  colspan=1 rowspan=1 > Scandal Incorporated </td><td colspan=1 rowspan=1 > Jess Blanchard - Tabloid Reporter </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1957 </td><td colspan=1 rowspan=1 > Tomahawk Trail </td><td colspan=1 rowspan=1 > Pvt. Barrow </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1957 </td><td colspan=1 rowspan=1 > Outlaw's Son </td><td colspan=1 rowspan=1 > Deputy Marshal Raph Striker </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1958 </td><td colspan=1 rowspan=1 > Hot Car Girl </td><td colspan=1 rowspan=1 > Det. Lt. Ryan </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1959 </td><td colspan=1 rowspan=1 > Gunmen from Laredo </td><td colspan=1 rowspan=1 > Gil Reardon </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1970 </td><td colspan=1 rowspan=1 > Airport </td><td colspan=1 rowspan=1 > Jack Dunlap - Passenger </td><td colspan=1 rowspan=1 > Uncredited </td></tr>
<tr> <td colspan=1 rowspan=1 > 1972 </td><td colspan=1 rowspan=1 > The Stoolie </td><td colspan=1 rowspan=1 > Big Daddy at Pool </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
What roles did Robert Knapp appear as in Scandal Incorporated and Mesa of Lost Women and in what years?
Answer:
Robert Knapp appeared in Scandal Incorporated as the tabloid reporter Jess Blanchard in 1956 and as Grant Phillips in Mesa of Lost Women in 1953.