Last week we were treated to the first trailer of 'Gotham,' now DC comics other series that will debut this fall on NBC 'Constatantine' trailer hits the net. Matt Ryan plays John Constatantine, an occult investigator who can see souls. "Constantine' will air on Fridays this fall on NBC. If the fall seems to far away, we suggest you watch the underrated 2005 'Constantine,' movie starring Keanu Reeves.