Nathan Fillion Richard Castle Actor Stana Katic NYPD Captain Kate Beckett Actor Susan Sullivan Martha Rodgers Actor Molly C. Quinn Alexis Castle Actor Ruben Santiago-Hudson Captain Roy Montgomery Actor Tamala Jones Lanie Parish Actor Jon Huertas NYPD Detective Javier Esposito Actor Seamus Dever NYPD Detective Kevin Ryan Actor Scott Elrod Brad Dekker Guest Star Sarah Brown Amanda Livingston Guest Star Jack McGee Dale Fickas Guest Star Rick Gonzalez Mickey Carlson Guest Star Senta Moses Michele Langford Guest Star Siena Goines Donna Vincennes Guest Star Christie Lynn Smith Melanie Kopek Guest Star Andrew W. Marlowe Executive Producer Armyan Bernstein Executive Producer Barry Schindel Executive Producer Rob Bowman Executive Producer Laurie Zaks Executive Producer Terence Paul Winter Writer Rosemary Rodriguez Director