CASTLE BELIEVES THE ANTICHRIST COULD BE THE KILLER, ON ABC'S "CASTLE"

"Hell to Pay" - When an axe-wielding, escaped psychiatric inmate drops dead in Castle's P.I. office, Castle and Beckett's investigation leads Castle to suspect the victim's death could be the work of the Antichrist, on "Castle," MONDAY, MAY 9 (10:00-11:00 p.m. EDT), on the ABC Television Network.

"Castle" stars Nathan Fillion as Richard Castle, Stana Katic as NYPD Captain Kate Beckett, Tamala Jones as Medical Examiner Lanie Parish, Jon Huertas as NYPD Detective Javier Esposito, Seamus Dever as NYPD Detective Kevin Ryan, Molly Quinn as Alexis Castle with Susan Sullivan as Martha Rodgers. For season eight, Toks Olagundoye ("The Neighbors") joined the series as Hayley.

Guest cast: Ronnie Steadman as Gabriel Shaw, Emanuel Loarca as Guard, Michael Chieffo as Dr. Brock Martin, Anne-Marie Johnson as Sondra Kramer, Matthew Borlenghi as Rollins.

"Hell to Pay" was written by Jim Adler (story) and Adam Frost & Nancy Kiu (teleplay) and directed by John Terlesky.

"Castle" is produced by ABC Studios. Executive producers are Terence Paul Winter, Alexi Hawley, Rob Bowman, Rob Hanning and Armyan Bernstein.

"Castle" is broadcast in 720 Progressive (720P), ABC's selected HDTV format, with 5.1 channel surround sound. A TV parental guideline will be assigned closer to airdate.