** AIRDATE CHANGE **

THE EXPLOSIVE TWO-PARTER OF "CASTLE" CONCLUDES ON ABC

Dana Delany Guest Stars

"Boom!" � In the second part of the story begun in "Tick, Tick, Tick...," the serial killer remains at large and is taunting Castle, Beckett and Jordan Shaw (guest star Dana Delany) to catch him, on "Castle," MONDAY, MARCH 29 (10:02-11:00 p.m., ET) on ABC. Delany plays Federal Agent Jordan Shaw, an insightful and accomplished Federal Investigator who teams up with Castle and Beckett to hunt down this cunning and elusive serial killer.

Note: This episode was originally scheduled for March 22.

"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: Dana Delany as Federal Agent Jordan Shaw, Leonard Roberts as Jason Avery, Dameon Clarke as the killer.

"Boom!" was written by Elizabeth Davis and directed by John Terlesky.

"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.

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