After Don Siegel suffered a heart attack during production, Sam Peckinpah stepped in and directed some of the film without credit. Screenwriter Frank D. Gilroy removed his name from the film and was credited as "Burt Blessing".
Don Siegel had 25 years earlier been a mentor to Sam Peckinpah, who at this time was all-but banished from the industry due to his troubled film productions. Siegel gave the director a chance to return to filmmaking. He asked Peckinpah if he would be interested in directing 12 days of second unit work on this film. Peckinpah immediately accepted, and his earnest collaboration with his longtime friend was noted within the industry. While Peckinpah's work was uncredited, it would lead to his hiring as the director of his final film The Osterman Weekend (1983).
Lalo Schifrin composed and recorded what would have been his sixth score for director Don Siegel, but it was rejected by the studio despite Siegel's objections. This was one of several fights Siegel had on this, his last film. Reported by the Los Angeles Times in 1982.