20. 'Requiem for the Big East' (Dir. Ezra Edelman)
Not just a lament for what's been lost with widespread NCAA conference realignment, Requiem for the Big East doubles as a mini-history of how ESPN grew in prominence in the 1980s, thanks to its college basketball cablecasts and the colorful personalities in the ascendant Big East. It's a reminder that even institutions that seem firmly established – like the network carrying 30 for 30 – have origin points, and someday maybe even endings.