To delete a podcast on Substack, head to your Podcast settings page: https://www.your.substack.com/publish/settings/podcast/edit
In the Danger Zone section, click "Delete" next to Delete podcast.
Don't see the option to delete your podcast? It's likely that your podcast is attached to a section. You can delete your podcast by deleting the section. Head to your publication's Settings page and scroll to the Sections part of the page.
Click "Edit" next to the section and in the Danger Zone, click on Delete next to "Delete section".
Note: If you delete a section, any posts and episodes in that section will be permanently deleted.