CASTLE & BECKETT'S CASE OF A YOUNG MAN KILLED BY A 200-YEAR-OLD BULLET TAKES THEM INTO A SECRET STEAMPUNK SOCIETY, ON ABC'S "CASTLE"

Victor Webster, Ken Baumann and Eden Riegel Guest Star

"Punked" - Castle and Beckett look into the murder of a young mathematician gunned down with a 200-year-old bullet, sparking some wild theories by Castle about a time-travelling killer. When their investigation uncovers a tricked-out DeLorean and a suspect in Victorian clothing, is it possible Castle's crazy idea has some validity? This winding tale twists through the towers of Wall Street and into the world of a secret steampunk society that embraces the romance and simplicity of the past, while coupling it with the hope and promise of the future, on "Castle," MONDAY, OCTOBER 11 (10:00-11:00 p.m., ET), on the ABC Television Network. Victor Webster (as Beckett's new boyfriend), Ken Baumann (as Alexis' first boyfriend) and Eden Riegel (as the sister of the murder victim) guest star in the episode.

"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: Victor Webster as Josh Davidson, Ken Baumann as Ashley, Eden Riegel as Rachel Goldstein, Andrew Leeds as Adam Murphy, Ramon De Ocampo as Owen Peterson, Thomas Kopache as Abe Sandrich, Jen Lilley as Julia Foster.

"Punked" was written by David Grae and directed by Rob Bowman.

"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.

"Naked Heat" (out September 28) is the thrilling sequel to Richard Castle's "Heat Wave," which spent 16 weeks on The New York Times bestseller list when it was published last fall. This is Castle's second mystery novel to feature Nikki Heat, a tough, sexy and professional detective based on NYPD Homicide Detective Kate Beckett, with whom Castle solves crimes and trades barbs from one case to the next. The two are no strangers to innuendos and unfulfilled sexual tension while trailing murderers.

For more information on "Castle," visit ABC.com. Viewers can also follow the show via http://facebook.com/Castle and Twitter: Castle_ABC