Charles Halford was a main cast member on an American television series featuring a DC comics character that was cenceled after only one season due to what?
Constantine (TV series): Constantine is an American television series developed by Daniel Cerone and David S. Goyer for NBC, featuring the DC Comics character John Constantine. Constantine (TV series):  On May 8, 2015, NBC canceled "Constantine" after only one season due to poor ratings.
i don't know