WHEN BECKETT BECOMES PRIVATE PROTECTION FOR A CHARMING ENTREPRENEUR, CASTLE WANTS TO SOLVE THE CASE FAST, ON ABC'S "CASTLE"

Guest Starring Ioan Gruffudd as Billionaire Entrepreneur Eric Vaughn

"The Squab and the Quail" -- When Beckett is assigned to protect Erik Vaughn, a charming billionaire entrepreneur whose life is in danger, she's forced to reflect on her relationship with Castle which has begun to plateau. Meanwhile, consumed with jealousy, Castle goes to extraordinary lengths to solve the case and separate the two of them, on "Castle," MONDAY, APRIL 29 (10:01-11:00 p.m., ET), on the ABC Television Network.

"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: Ioan Gruffudd as Eric Vaughn, Russ Bain as Bruno Toft, Andy Wagner as Lucas Shaw, Jamie Hill as Petra Visser.

"The Squab and the Quail" story by Jason Wilborn & Adam Frost with teleplay by Jason Wilborn and directed by Paul Holahan.

"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