In 2005, Warner Bros. Pictures partnership with DC comics led to the release of Constantine, a movie that focuses on a lesser-known character in the comic giant's vault. Created by Alan Moore for his first appearance in a 1985 Swamp Thing issue, John Constantine is a supernatural detective who exorcises demons and walks between the world of people and that of angels and demons. Constantine is British, blonde, and built like musician Sting, but casting Keanu Reeves as a dark-haired American version of the character didn't matter at the box office since the film grossed over $200 million on a budget half as large.

Critics disliked the film, however, and considered it a failure. Thanks to home video releases and fans, the movie has become a cult classic that still enjoys notoriety and a healthy fandom to this day. Most may be surprised to learn that no one in front of or behind the camera had knowledge of the character of Constantine prior to signing onto the movie, or that star Reeves met with a real exorcist to get a handle on his role. While no suspicious or supernatural events plagued production, the filming has its share of surprising stories from those involved.