Warning Sign (1985) is a Drama, Science Fiction, Thriller film that follows an accident occurs in an ultra-secret government biological weapons laboratory spreading a sinister bacteria. Currently, you can watch Warning Sign 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 6.0 out of 10 from 75 votes. Fans of drama movies may also want to explore similar titles below.