Bug is a 1975 American horror film in Panavision, starring Bradford Dillman, Joanna Miles, and Richard Gilliland. An earthquake releases a bunch of mutant cockroaches that can create fire by rubbing their cerci together. Eventually most of the bugs die because they cannot survive in the low air pressure on the Earth’s surface, but a scientist Prof. James Parmiter (Dillman) keeps one alive in a pressure chamber. He successfully breeds the cockroach with a modern bug creating a breed of intelligent, flying super-bugs. It was directed by Jeannot Szwarc and written by William Castle and Thomas Page, from Page’s 1973 novel The Hephaestus Plague. It was the last film Castle was involved in before his death.