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 Victor Webster Josh Davidson Guest Star Ken Baumann Ashley Guest Star Eden Riegel Rachel Goldstein Guest Star Andrew Leeds Adam Murphy Guest Star Ramon De Ocampo Owen Peterson Guest Star Thomas Kopache Abe Sandrich Guest Star Jen Lilley Julia Foster Guest Star Andrew W. Marlowe Executive Producer Rob Bowman Executive Producer, Director Laurie Zaks Executive Producer David Amann Executive Producer David Grae Writer