VIDEO: Sneak Peek - Billy Miller Guests on Next CASTLE on ABC

On the next episode of ABC's CASTLE titled "Number One Fan" a desperate young murder suspect, Emma Briggs, (guest star Alicia Lagano, "The Client List,") takes hostages at gunpoint then mysteriously insists that she will only negotiate with one person: Richard Castle.

The episode airs MONDAY, OCTOBER 14 (10:01-11:00 p.m., ET) on the ABC Television Network. Billy Miller ("The Young and the Restless") also guest stars as Mickey Gerhardt, a hot headed Wall Street banker who gets caught in the hostage situation. Get a sneak peek below!

"Castle" stars Nathan Fillion as Richard Castle, Stana Katic as NYPD Detective Kate Beckett, Susan Sullivan as Martha Rodgers, Molly Quinn as Alexis Castle, Penny Johnson Jerald as NYPD Captain Victoria Gates, TAMALA JONES as Medical Examiner Lanie Parish, Jon Huertas as NYPD Detective Javier Esposito, and Seamus Dever as NYPD Detective Kevin Ryan.

Guest Cast: Alicia Lagano as Emma Briggs, Billy Miller as Mickey Gerhardt.

"Number One Fan" was written by Terence Paul Winter and directed by John Terlesky.