[Removing duplicate MySQL data with a Flag?]

I have a MySQL query that gets data from two tables via a Join query.

 

The resulting dataset is this:

 

 

See how I have two rows of the title "Coming Out for Christmas". The only difference is the values in the "name" column. I need to essentially use the data from the first "Coming Out for Christmas" row for most of the page and then piece together a comma separated list from the data in the "name" column. 

 

So I would get a list like "Test A, Test B". 

 

I know I need some kind of PHP flag to do this, but I don't know how or where ... any help?

 

$posterurl="noposter.png";
$titleCheck=null;
$cast=null;
$connected=Connect();
if($filmsQuery=mysqli_prepare($connected, "SELECT `films`.`title`, `films`.`release`, `films`.`poster`, `films`.`synopsis`, `films`.`status`, `cast`.`name` FROM `films` LEFT JOIN `cast` ON `cast`.`filmID`=`films`.`id`")){
mysqli_stmt_execute($filmsQuery);
mysqli_stmt_bind_result($filmsQuery, $title, $release, $poster, $synopsis, $status, $cast);
mysqli_stmt_store_result($filmsQuery);
$numofFilmsReturned=mysqli_stmt_num_rows($filmsQuery);
if($numofFilmsReturned>0){
$i=1;
while(mysqli_stmt_fetch($filmsQuery)){
if($titleCheck!=$title){
$titleCheck=$title;
$castlist=$cast.", ";
$castlist=rtrim($castlist, ",");
if($i==$numofFilmsReturned){$filmWrapper='Last';}else{}
if($poster==null || $poster==''){$posterurl=$posterurl;}else{$posterurl=$poster;}
if($status==0){$status="In Development";}else{$status="Completed";}
$releasedate=strtotime($release);
$releaseYear=date("Y", $releasedate);
$content.='<div id="filmWrapper'.$filmWrapper.'">
<div id="filmTitle">
<div class="filmLeft"><span class="bold">'.$title.'</span><br /><span class="filmStatus">('.$releaseYear.')</span></div>
<div class="filmRight"><span class="filmStatus">Status: '.$status.'</span></div>
</div>
<div id="filmPosterSynopsis">
<div class="filmLeft" id="filmPoster"><img src="'.$posterurl.'" /></div>
<div class="filmRight" id="filmSynopsis">Film Synopsis</div>
</div>
<div id="filmLinksCast">
<div class="filmLeft" id="filmLinks">Website | IMDB | Facebook</div>
<div class="filmRight" id="filmCast"><span class="bold">Cast:</span> '.$castlist.'</div>
</div>
</div>';
$i++;
}
}
}
else{
$content.='<div>Could not find any films.</div>';
}
}
else{
$content.='<div id="queryFailed">Query failed to run correctly.</div>';
}
mysqli_close($connected);

 

This is the result right now: http://www.andrewmccarrick.com/kam/?p=films