Dir. Connor Matheson, UK, 2017, 90mins Made on a crowdfunded shoestring budget, The Doom Doc is a visceral, immersive dive into the hazy black hole that lies at one extreme of the musical spectrum. Doom, whose foundations were laid on Black Sabbath’s debut album in 1970, is a genre of heavy metal that is all about crushing riffs played at sluggish tempos through huge amps. It has experienced a resurgence in popularity of late, and in this documentary, Sheffield filmmaker Connor Matheson follows the story of Holy Spider Promotions, a DIY collective in his city who battle to put on doom gigs, vying for space and attention on behalf of an extreme and polarising form of music. Using the lens of doom, Matheson explores issues such as drug use, mental health and gentrification, and speaks with scene luminaries including Bill Ward, Black Sabbath’s original drummer, and members of Conan, Crowbar and Primitive Man.