The TV Zone

We've got a new serial killer in the house - John Lithgow, who's not someone exactly typecast to do this, but hey, he's killed on Broadway. This shouldn't be a stretch.

Per Showtime: He'll be in all of season four, which launches Sept. 27, and will play, and I quote: "Walter Simmons, an unassuming, mild-mannered suburbanite who has been living a dual life as one of America’s most prolific and deadliest serial killers. Dubbed the 'Trinity Killer' because of his proclivity to kill in three’s, he relocates to Miami after being tracked by F.B.I. Special Agent Frank Lundy (Keith Carradine). Brought on to assist in the investigation of Miami’s latest serial killer, Dexter Morgan (Michael C. Hall) becomes fascinated with 'Trinity’s' unique killing methods and his ability to evade capture for almost three decades. "

(Pix of mild-mannered triplicate murderer, by Getty)