How to automatically download and retain latest podcast only?

I subscribe to a few Podcasts (CNN 5 Things, WSJ What's news, Wall Street Breakfast, etc.); which are updated on a daily basis. I listen to them during my commute. Is there a way to download and retain the latest Podcast only? I had a Podcast app which shutdown 2 years ago that downloaded only the latest Podcast. They playlist was setup to play the shows which enabled me to play the episode from the shows; when a New episode was downloaded, they earlier episodes were available for streaming or manual download.