Stukov's forces are a brood of zerg and infested terrans led by Alexei Stukov. Following Sarah Kerrigan's transformation on Zerus, Stukov contacted her and told her about the experiments being performed on Skygeirr Platform. After defeating the shapeshifter, Emil Narud, and his hybrids, Stukov joined the Swarm. During the Battle of Korhal, Stukov's forces, infested terrans and aberrations, attacked Dominion entrenchments.