Curiosidades

The phone number shown on Constantine's business card (404) 248-7182) is a working number. When dialed it connects to an outgoing voice message from Constantine. 404 is also the area code for Atlanta, where the series is filmed and set.

Lucy Griffiths appeared as Liv Aberdine, who was supposed to be the female lead of the show. She was subsequently dropped after executive producers David S. Goyer and Daniel Cerone decided to take the series in a different creative direction. Some of Griffiths' final scenes from the pilot were re-shot, explaining why she doesn't join Constantine in his adventures as it was originally intended.

An online petition has begun, to convince other networks to pick up the show for a second season. The petition, aimed at networks such as USA, The CW Network, and El Rey, has reached upwards of 50,000 signatures.

In the premiere, Liv picks up a gold helmet. John warns her "put that down, before it puts you down." The helmet resembles the Helm of Nabu, the regular headgear of Doctor Fate, a fellow DC comics character who is a wizard himself, and John's warning is a reference to the lore of the Nabu persona being tied to the helmet, taking control of whosoever puts it on.

Though cancelled after one season, Constantine makes an appearance in the 4th season of Arrow (2012) and the 3rd and 4th and 5th and 6th seasons of DC's Legends of Tomorrow (2021).