Nathan Fillion Richard Castle Actor Stana Katic NYPD Captain Kate Beckett Actor Susan Sullivan Martha Rodgers Actor Jon Huertas NYPD Detective Javier Esposito Actor Molly C. Quinn Alexis Castle Actor Ruben Santiago-Hudson Capt. Roy Montgomery Actor Tamala Jones Lanie Parish Actor Seamus Dever NYPD Detective Kevin Ryan Actor James Patterson Himself Guest Star Stephen J. Cannell Himself Guest Star Monet Mazur Gina Griffin Guest Star Keir Dullea Jonathan Tisdale Guest Star Dan Castellaneta Judge Markway Guest Star Brian Avers Harrison Tisdale Guest Star Andrew W. Marlowe Executive Producer, Writer Armyan Bernstein Executive Producer Barry Schindel Executive Producer Rob Bowman Executive Producer, Director Laurie Zaks Executive Producer