How to set the landing page for the episodes landing page

Hi there:

I have a website that I have many different blogs that use the index.php page.
So, on my podcast page, it seems I cannot change the episodes loop from using the index.php page, I have gone to expert settings and tried to change the landing page, but it seems to always use the index.php page. I do not want to have one php page with multiple conditional parts.

What is the proper way to do this? Can I create and point to my own template page?