“Cool Boys” – Detective Slaughter (guest star Adam Baldwin) returns to enlist Castle’s help in solving a high-stakes robbery case. But when a body is found linked to the crime, Slaughter becomes the number one suspect in the heist turned murder, while Castle has to determine whether he’s guilty or help to prove he’s innocent. “Cool Boys” will air on MONDAY, NOVEMBER 9 (10:01-11:00 p.m. ET/PT) on the ABC Television Network.

“Castle” stars Nathan Fillion as Richard Castle, Stana Katic as NYPD Detective Kate Beckett, Tamala Jones as Medical Examiner Lanie Parish, Jon Huertas as NYPD Detective Javier Esposito, Seamus Dever as NYPD Detective Kevin Ryan, Molly Quinn as Alexis Castle with Susan Sullivan as Martha Rodgers. For Season 8, Toks Olagundoye (“The Neighbors”) has joined the series as Hayley.

Guest cast: Adam Baldwin as Detective Slaughter, Kerry Barker as Dawn, Corey Reynolds as Mark West, Brian Gaskill as David Lacey.

“Cool Boys” was written by Alexi Hawley and directed by Paul Holahan.

“Castle” is produced by ABC Studios. Executive producers are Terence Paul Winter, Alexi Hawley, Rob Bowman, Rob Hanning and Armyan Bernstein.