The small town of Riverside, California has more problems than the usual San Andreas fault city. A destructive earthquake has not only shaken up the population, but also released a disgusting cockroach-like insect from the center of the earth. The bugs, which are ten inches long, can make ears bleed by making shrills sounds, and cause people to spontaneously combust at will, cause various problems and death for the unfortunate denizens of Riverside. Though it's middling as far as killer bug movies go, there are some fun and entertaining moments to be had here. Good cast, too, featuring the always amiable Bradford Dillman in the lead and Patty (THE BAD SEED) McCormack as a victim. Written, produced, and featuring a cameo appearance from the king of theater gimmicks - William Castle - who had a typically outrageous idea of putting devices under theater seats to emulate scurrying bugs. Unfortunately, that never happened. It was rated PG, but still has plenty of scenes guaranteed to you squirm in your seat. Charles Fox did the music, and Paramount released it to home video. It was the last film project for Castle.