CASTLE AND BECKETT BECOME FRUSTRATED OVER TWISTS AND TURNS IN A MURDER CASE, ON ABC'S "CASTLE"

"Fool Me Once" � When an Arctic explorer is killed during a polar expedition, the mysterious circumstances of his death take Castle and Beckett from the penthouses of Park Avenue to the halls of the CIA. But Castle's delight at the case's many twists and turns soon turns to frustration as he realizes that their elusive killer might just be fooling them all, on "Castle," SATURDAY, DECEMBER 12 (10:00-11:00 p.m., ET) on ABC. (Rebroadcast: OAD: 10/12/09)

"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: Kathleen Rose Perkins as Elise Finnegan, Robert Pine as Gerry Finnegan, David Ramsey as Jim Wheeler.

"Fool Me Once" was written by Alexi Hawley and directed by Bryan Spicer.

"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. This program carries a TV-PG,L,V parental guideline.

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