Footage from the 1967 film Poor Cow (1967) (Ken Loach's directorial debut) is featured as flashbacks of Wilson (Terence Stamp) with his baby daughter and wife.
During filming, Steven Soderbergh was unsure exactly which scenes from Poor Cow (1967) he wanted to use. So he asked Warner Bros. for permission to use the entire film so that he could choose the scenes later. But Warner Bros. refused. Soderbergh told the head of Warner Bros. that he would never make a film for him again. The executive relented and allowed Soderbergh to use any scenes from the film that he wished.
The first song heard in the movie is "The Seeker" by The Who. During the 1960s, one of The Who's two managers was Christopher Stamp, Terence Stamp's brother.
Ann-Margret shot scenes with Peter Fonda, as his ex-wife. These scenes were not used in the completed film, as the director felt he had already established Fonda's creepiness adequately.
Wilson calls Roel "Fangio" during the car chase. Juan Manuel Fangio was a five-time Formula One World Champion in the 1950s.
Steven Soderbergh: [company named "Perennial"] The courier company that Terence Stamp's character visits is called Perennial Couriers. Also see Traffic (2000), Out of Sight (1998) and The Underneath (1995).