CASTLE & BECKETT SUDDENLY FIND THEMSELVES ON OPPOSITE SIDES OF A MURDER CASE, ON ABC'S "CASTLE"

"The Final Nail" -- Castle and Beckett find themselves on opposite sides of the case when Castle's old school friend (guest star Jason Wiles) emerges as the prime suspect in his own wife's murder. As they work to solve the crime, Castle comes to realize that one of two terrible things must be true� Either Detective Beckett is about to arrest an innocent man for murder, or his old friend is a cold-blooded killer, on "Castle," MONDAY, FEBRUARY 14 (10:01-11:00 p.m. ET) on the ABC Television Network.

"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: Jason Wiles as Damian Westlake, Tom Irwin as Simon Campbell, Alicia Coppola as Amber Patinelli, Efrain Figueroa as Ray Salazar, Andrea Bogart as Callie Langston.

"The Final Nail" was written by Moira Kirland 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. Viewers can also follow the show via http://facebook.com/Castle and Twitter: Castle_ABC