Centuries (okay, a few years) ago, Steven Harnell began recording footage for something tentatively given the very tentative title of An Untitled Documentary About House Music. A few people asked me about it, but the project seemed to be sliding into oblivion – until a couple of weeks ago, the site hadn’t been updated since around 2008.

So it was with some surprise that I realized that the Untitled Doc and Unconscious Therapy, a documentary debuting at the Chicago International Movies & Music Festival this Saturday, were one and the same.

The trailer for it is incredibly slick and quite likely the best I’ve seen from the vast but not necessarily bountiful House Music Doc genre, featuring shots with Frankie Knuckles, Mark Farina, Derrick Carter, Marques Wyatt, Doc Martin, Andy Caldwell, Heather, Colette, Lego (tearing up here) and more.

The 90 minute film debuts at Logan Theatre 4 on Saturday April 20, 2013 at the appropriately late hour of 10pm – more info via CIMM. There’s also late-breaking word of an afterparty to be held Saturday night after the showing at SpyBar with several of the stars of the film DJing, lead by Derrick Carter, Diz and Lego.