If you're using WordPress and Seriously Simple Podcasting to manage your podcast content and want to remove an episode from your feed then just deleting (or making Draft status in WordPress) that post it will remove it from the feed and your /podcast page.  

Doing this will not delete that post from your Castos dashboard however, so if you'd like to remove it from your Castos dashboard as well then clicking on the episode in the episode list page and then the Delete button in the bottom right corner of that page will delete the episode.  

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