CASTLE'S BOOK AGENT � GUEST STAR DEBI MAZAR � HAS A PROPOSITION THAT COULD CHANGE EVERYTHING, ON ABC'S "CASTLE"

"When the Bough Breaks" � Castle's book agent, Paula Haas (guest star Debi Mazar), approaches him with a career changing opportunity, but taking it would mean the end of his relationship with Beckett. Will the murder of an unidentified woman found dead in a manhole be their last case together?, on "Castle," MONDAY, OCTOBER 19 (10:02-11:00 p.m., ET) on ABC.

"Castle" stars Nathan Fillion as Richard Castle, Stana Katic as NYPD Detective Kate Beckett, Susan Sullivan as Martha Rodgers, Molly Quinn as Alexis Castle, Ruben Santiago-Hudson as NYPD Captain Roy Montgomery, Tamala Jones as Medical Examiner Lanie Parish, Jon Huertas as NYPD Detective Javier Esposito and Seamus Dever as NYPD Detective Kevin Ryan.

Guest Cast: Debi Mazar as Paula Haas, Reed Diamond as Dr.Cameron Talbot, Elaine Hendrix as Melissa Talbot.

"When the Bough Breaks" was written by Rene Echevarria and directed by John Terlesky.

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

For more information on "Castle," visit ABC.com