In this case, since there’s a many-to-many relationship between movies and actors, I recommend making them two separate pods with a relationship between them. See the intro video at https://pods.io/ … I don’t remember where he explains relationship fields but it’s all in there.
You don’t need to use PHP if you don’t want to. You could use Pods templates (see the video). Something like this for movies (it’s a tweak of one of mine). It assumes you’ve filled in the title and content for both movies and actors:
<div>
[if related_actors]
<h4 style="font-weight:bold; font-size:x-large;">Actors:</h4>
<div style="padding-left:4em;">
[each related_actors]
<h3>
[if post_thumbnail_url]
<img src="{@post_thumbnail_url.small}" style="float:left; width:150px; height:auto; padding-right: 15px;">
[/if]
{@post_title}
</h3>
<div style="clear:both;">{@post_content}</div>
[/each]
</div>
[/if]
</div>