CASTLE & BECKETT'S KEY MURDER WITNESS SAW EVERYTHING AND CAN'T REMEMBER ANYTHING, ON ABC'S "CASTLE"

"The Fifth Bullet" � When an art dealer is gunned down in his gallery, Castle & Beckett discover that a bullet is inexplicably missing from the crime scene. The mystery is deepened by an amnesiac who witnessed the crime but can't remember what he saw or even who he is... on "Castle," MONDAY, DECEMBER 7 (10:00-11:00 p.m., ET/PT) 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: Marc Blucas as Jeremy Preswick, Anne Dudek as Emma Carnes, Carlo Rota as Bahir "Bobby" Harun.

"The Fifth Bullet" was written by David Grae 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