CORBIN BERNSEN, REBECCA BUDIG, CAMERON MATHISON AND JANE SEYMOUR GUEST STAR IN SOAPS-THEMED STORYLINE Of ABC'S "CASTLE"

"One Life to Lose" -- Corbin Bernsen ("The Young and the Restless," "Psyche"), Rebecca Budig ("All My Children"), Cameron Mathison ("All My Children") and Jane Seymour ("Dr. Quinn, Medicine Woman") guest star in a soap opera-themed storyline of "Castle," MONDAY, MARCH 21 (10:01-11:00 p.m., ET) on the ABC Television Network.

In the episode, a murder has been committed on the set of "Temptation Lane," one of New York's longest running soap operas. Sarah Cutler, the head writer on the soap, has been killed with a fire axe. Castle & Beckett quickly discover that the behind the scenes drama at "Temptation Lane" is just as scandalous as the fictitious storylines, and just about everyone would kill to get ahead. Ultimately, Castle's unique skill set as a writer leads to a discovery about the killer and the secret he or she would do anything to protect.

Character teasers: Lance Buchanan (Bernsen), a rugged, self-assured, veteran actor on "Temptation Lane," has a romantic history with Castle's mother, Martha Rodgers; Mandy Bronson (Budig) is the young and gorgeous diva lead actress on the soap opera who is very aware of her sexuality and uses it to her advantage any chance she gets; Vince Bowers (Mathison) is the devastated husband of the victim, and as a director on "Temptation Lane" is very involved in the backstage drama; and Gloria Chambers (Seymour), the grieving mother of the murder victim, is revealed in a shocking twist to have a deep, dark secret that she's desperate to keep.

"Castle" stars Nathan Fillion (who was on the daytime series "One Life to Live" as Joey Buchanan from 1994-1997 and on two episodes in 2007) 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: Corbin Bernsen as Lance Buchanan, Rebecca Budig as Mandy Bronson, Cameron Mathison as Vince Bowers, Jane Seymour as Gloria Chambers.

"One Life to Lose" was written by Elizabeth Davis and directed by David M. Barrett.

"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