Claim: John Constantine is a fictional character.

Constantine is an American television series developed by Daniel Cerone and David S. Goyer for NBC , featuring the DC Comics character John Constantine . Matt Ryan stars as Constantine , a British exorcist and occult detective who actively hunts supernatural entities . The series aired from October 24 , 2014 to February 13 , 2015 , over 13 episodes . On May 8 , 2015 , NBC canceled Constantine after only one season due to poor ratings . Ryan reprised the role in a guest appearance in the fourth season of The CW series Arrow , set within the Arrowverse , and it was announced in January 2017 that he would voice the character in an animated web series on The CW Seed later that year .