Related: theming an entire arc of episodes. In this current "season" of my Trek campaign (like an actual series, every 23-26 'episodes' is a 'season' and then we have an interstitial/special episode where promotions and other big advancement not covered by XP takes place), one of the themes has been the Tom O'Bedlam poem. That's how I have 'A Knight of Ghosts & SHadows' fit in. There's 8 other episodes in the season with names from the same poem, scattered over the course of the season.