Nathan Fillion Richard Castle Actor Stana Katic NYPD Captain Kate Beckett Actor Susan Sullivan Martha Rodgers Actor Molly C. Quinn Alexis Castle Actor Penny Johnson Capt. Victoria Gates Actor Tamala Jones Lanie Parish Actor Jon Huertas NYPD Detective Javier Esposito Actor Seamus Dever NYPD Detective Kevin Ryan Actor Jennifer Beals Guest Star Josh Stamberg Guest Star David Chisum Guest Star Jim Turner Guest Star Cal Gibson Guest Star Russell Edge Guest Star Andrew W. Marlowe Executive Producer, Writer Rob Bowman Executive Producer, Director Laurie Zaks Executive Producer David Amann Executive Producer