Can I take the recent episodes row off my Episodes page, or add my Destinations to it?

Yes. Your Episodes page is built from settings, so open your website, then Site Settings, Podcasts/Episodes, and the Episodes page switches. Show the recent episodes row set to No leaves the featured episode at the top on its own. Show the destinations cards set to Yes adds the cards from your Categories block under the featured episode, with the same cards, pins and hidden cards you set on the Content Categories tile. Show the topic strips set to No takes the Browse by Topic rows off the page. Click Save to keep your changes.