PASADENA, Calif. — In his first regular series television role, on the Fox drama “The Following,” Kevin Bacon is getting in deep. The veteran film actor (“Footloose,” “Apollo 13,” “Mystic River”) stars as Ryan Hardy, a former FBI agent who has literally written the book on Edgar Allan Poe-obsessed serial killer Joe Carroll (James Purefoy). Not only does Hardy have a complicated romantic entanglement and a serious drinking problem, he also has a pacemaker thanks to a run-in with Carroll. We sat down with Bacon recently at the Television Critics Association press tour.