There was not much promotion for “Constantine” as a TV series and the few who did not know something about John Constantine or its 2005 film starring Keanu Reeves, probably did not know what the show was actually about.
“Constantine” was about a demon hunter and occult master John Constantine, who travels across the country and around the world in battling the supernatural and attempting to save his own soul in the process.
With a psychic Zed as a companion, angel Manny as a constant presence, and an endless supply of demons and supernatural beings to combat, “Constantine” had the plot potential to run for many seasons.
Unfortunately, that did not happen as NBC decided not to renew the show because it no longer wants to risk experimenting for a second season.
Although it is a show with a huge fan base considering that it is based on DC Comics, the network simply believes that the show was not good enough for its own preference for a TV series.
Many view the move of NBC as counter-productive as the trend these days is to jump on the superhero genre based on comic books because those are guaranteed to bring in the numbers and the money.