A knife-wielding masked man. A pig’s head outside his parents’ door. Running 30 marathons in 35 days. The Cambridge professor Jason Arday, accused of plagiarism, says he’s been through it all. Not everyone believes him.
The director of slasher films that defined horror from the 1970s through the ’90s realizes his latest work, “Cathedral,” as both a graphic novel and a hard-rock album.