For the 4th edition of Involve's 'Nightclub Pros' series, Regal once again invites a mix of established and upcoming artists to showcase the bandwidth of the Madrid based label's sound. On the front side, Roll Dann, who made his Involve debut oin the very first Nightclub Pros edition, opens the VA with 'Culebra', a heavy-hitting techno masterpiece with a rolling bassline, tinges of industrial sounds and a driving energetic drum work. Following up, SlugoS delivers the fast-paced, distorted sounding warehouse anthem 'Seconds to Midnight', characterizes by a rumbling kick, a ferocious melody and an ambience reminiscent of the early 2000's Schranz movement. On the back side, Kristian Heikkila teams up with Johan Afterglow, keeping up the energy with their track 'Lies', making the listeners dive into an underground world where distorted and echoing screams penetrate their brains. Up-and-coming producer SWRD, part of the duo ITNA, closes the record with a mystic ride staged by a combination of synths and an ominous piano melody in his track 'Alpha', an epic end to the 4th edition of the NIghtclub Pros series.