News TV Videos GRIMM preview clips – Watch “Volcanalis” tonight on NBC Written by Lena Lamoray on April 26, 2013 “Volcanalis” – On the next new episode of Grimm, a demon arises and all hell will break lose! Meet Stefania Adalind crosses paths with a gypsy with sinister intentions. Related posts:'The Brave' preview'Parks and Recreation' preview clips - Watch back-to-back episodes tonight on NBCSHAUN WHITE: RUSSIA CALLING preview clips