Credit: (L-R) DC Comics; Ian McManus

John Constantine is getting some potential help this fall: NBC is adding DC Comics character Det. Jim Corrigan to its Constantine series.

The New Orleans homicide detective will be played by Irish actor Emmett Scanlan, who is known to U.K. audiences for his roles on The BBC’s Atlantis and The Fall, and recently received some global viewership for a minor riot-guard role in Guardians of the Galaxy.

Constantine stars Matt Ryan as the the sarcastic street magician in the title role who battles demons, figurative and literal, using his wit and knowledge of the occult. Corrigan is potential ally who “is obsessed with justice, and who doesn’t let police procedure or red tape stop him from putting away the bad guys, even if the bad guys turn out to be inhuman.” As DC Comics fans know, however, Corrigan also eventually becomes the avenging spirit The Spectre.

Constantine debuts Friday, Oct. 24 at 10 p.m. after Grimm.