Phase IV (1974) is a Horror, Science Fiction film that follows arizona ants mock the food chain on their way to a desert lab to get two scientists and a woman. Currently, you can watch Phase IV on Amazon Video, Apple TV Store, Google Play Movies, YouTube. Streaming availability may vary by country and platform over time. It has a user rating of 6.3 out of 10 from 293 votes. Fans of horror movies may also want to explore similar titles below.