It’s Friday morning, and the avid listeners of the most popular podcast ever, Serial, likely heard the last episode of the season sometime yesterday. (If not, no worries. No spoilers here.) There's something special about the format, the way the story unfolds, moving backward and forward across wrinkles and obsessions. There's something, dare I say, poetic about the ways the episodes talk back and forth with each other that resonates, too, with the way series of poems work with and against each other, troubling and teasing expectations in what Air Schooner Episode 41 calls "series syndrome."