Steve Carver says the film was shot so Corman could use footage from other films he had made. He said Howard Browne was a very factual writer but "not so good with dialogue" so other writers were brought in to work on the script. Carver says Gazzara was hard to work with on set. In an interview in 2020 he related how Gazzara, possibly under the influence of alcohol, set off a series of explosions and bullet hits too early: "Ben was the key in starting this off by pulling the trigger of a submachine gun. And he jumped the cue. He pulled the trigger too early. That set off a tremendous occurrence where stuntmen and cars went crazy. A lot of people could have gotten hurt." Gazzara apologized the next day.
