An earthquake releases a strain of mutant cockroaches with the ability to start fires, which proceed to cause destructive chaos in a small town. The studies carried out by scientist James Parmiter, however, reveal an intent with much more far-reaching consequences.
Bug is a 1975 American science fiction horror film directed by Jeannot Szwarc and written by William Castle and Thomas Page, from Page's novel The Hephaestus Plague (1973). Shot in Panavision, it was the last film Castle was involved in before his death in 1977. The film starred Bradford Dillman, Joanna Miles and Richard Gilliland.