Quite often, I see podcasters sharing their podcast episodes and they've titled something like: 
Episode 12: Jim Rodgers
Would you click on this if you came across it on social media? Probably not. This doesn't tell you anything about what you'll learn in the episode. 
Even worse, this does nothing for SEO...most people aren't randomly Googling episode numbers.
Stop putting the episode number in your title. Your episodes should be treated as any other searchable content. 
That means a title that entices people to click through and listen.