Development MGM bought the film rights to the novel in October 1974. The novel was published in April 1975. The
New York Times called the novel "a doozie of a thriller".
Peter Bellwood was the first writer. Then
Peter Hyams wrote a script. Hyams says
Dan Melnick then head of MGM told him he wanted Hyams to write and direct, but his last film
Peeper had flopped and Hyams said "he knew there was no way he was going to let me direct it." They did like the script but brought in
Richard Lester to direct. Hyams rewrote the script for Lester, who then left the project and
Don Siegel came on board. Hyams would leave to make
Capricorn One and Stirling Silliphant rewrote the script. In August 1976 it was announced Don Siegel would direct and Charles Bronson would star. Siegel had directed Bronson in TV in the late 50s and said "I wanted to do this one because of Bronson. I think we would make a natural team."
Filming Principal photography began in January 1977. Some of the film was shot in Helsinki, Finland, which doubled for Russia. A magazine in the Soviet Union ran an article critical of the film, claiming it aimed to stir up trouble and demonised the Russians. Don Siegel denied this saying the film was "pro Russia and pro peace." "I have to face the fact the story is cockamamie at best," said Siegel. "So I've been particularly painstaking to give the movie a feeling of authenticity." The city
skyline depicting
Houston, where part of the story line occurred, is actually that of
Great Falls, Montana, where the majority of the film was shot. During filming, the crew had to order two truckloads of snow needed for one of the scenes, because the
chinook winds in the area took away the snow they had. They were trucked from the mountains. Filming in downtown Great Falls was also included. The exploding building in one scene is actually the controlled demolition of the old
Paris Gibson Junior High School. The explosion scene was filmed on February 20, 1977. The present day Paris Gibson square was undamaged, but the explosion started roof fires on a couple of nearby houses that were quickly extinguished by city firefighters hired by the movie company on stand by. The Houston scenes were shot on a
Hollywood backlot, while the interior of the Houston
Hyatt Regency was portrayed by
5 Embarcadero Center in
San Francisco, California – the location which was also used in
The Towering Inferno. The scenes with fires and explosions at a rocket engine test site were filmed at Rocketdyne's Santa Susana Field Laboratory in the mountains northwest of Los Angeles. According to director Siegel, actress
Lee Remick was terrified of
Charles Bronson, and when asked to touch his face during a scene, responded, "I don't dare. He'll bite me!" As parts of the film were shot in Finland, there are several cameo appearances by Finnish movie stars, most notably
Ansa Ikonen. ==Reception==