Legendary horror writer-producer-director William Castle (The Tingler, I Saw What You Did, Rosemary's Baby) presents a creeping, crawling film nightmare that will have you screaming and squirming with fright! A massive earth tremor opens a deep crevasse in the California desert, releasing a bizarre, fiery, deadly breed of foot-long cockroaches. With their numbers multiplying and the death toll mounting, obsessive entomologist Bradford Dillman (Compulsion, The Swarm) desperately seeks a way to eliminate the seemingly indestructible critters before they spread clear across the country... and beyond! Joanna Miles (Judge Dredd) and Patricia McCormack (The Bad Seed) are among the terrorized cast in this suspenseful screamfest directed by Jeannot Szwarc (Jaws 2, TV's CSI: Miami).