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 Bruce Davison Guest Star Jay Paulson Guest Star Kwame Patterson Guest Star Larry Clarke Guest Star Jeremy Glazer Guest Star Judith Moreland Guest Star Kathleen M. Darcy Guest Star Andrew W. Marlowe Executive Producer Rob Bowman Executive Producer Laurie Zaks Executive Producer David Amann Executive Producer Terence Paul Winter Writer Jeff Bleckner Director