Phase IV is the only feature film directed by designer and filmmaker Saul Bass.
In a sealed lab in the Arizona desert, scientists James Lesko (Michael Murphy, Manhattan) and Dr. Ernest Hubbs (Nigel Davenport, A Man for All Seasons) search for answers to an evolutionary shift in the ant population; the development of a collective intelligence and cross-species hive mentality. With humanity under threat, the scientists are faced with the choice of either communicating with, or eradicating their antagonists.