The original love scene between Bronson and Jan Gan Boyd called for Boyd to be partially nude, but Boyd wasn't confident she could perform the scene and was nervous. Although contracted to be nude, Boyd asked the producers if she could do the scene clothed. They agreed because she had the support of star Bronson, who was adamant she be clothed if she was not comfortable.
This was the 16th and final time married couple Charles Bronson and Jill Ireland made a film together.
The White House was used as an actual filming location on this movie.
This is the biggest part for Jill Ireland in a movie starring her husband Charles Bronson. Usually cast as the ingenue or love interest, she's the co-lead here, as her character drives the entire plot.
Jan Gan Boyd and Charles Bronson formed a friendship during production, that saw Boyd regularly attend Christmas parties at the Bronson house.