John Hughes wasn't happy during filming of this movie, because it interfered with another project he cared about much more and resulted in his working a punishing schedule for months, but he agreed to direct it because Universal gave him a deal where he could also direct the more-valued project if he started this one first. The other film: Breakfast Club (1985).
Vernon Wells (Lord General) said his first time visiting America was when he filmed his part in this movie. After filming wrapped, he signed on as another villain in Commando (1985).