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 Adrian Pasdar Guest Star Victor Webster Guest Star Bahar Soomekh Guest Star Lochlyn Munro Guest Star Alon Aboutboul Guest Star Andrew W. Marlowe Executive Producer Rob Bowman Executive Producer, Director Laurie Zaks Executive Producer David Amann Executive Producer, Writer