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 Scott Broderick Guest Star Nikki Deloach Guest Star Don McManus Guest Star Brian McNamara Guest Star Meredith Monroe Guest Star Andrew W. Marlowe Executive Producer David Amann Executive Producer Rob Bowman Executive Producer Armyan Bernstein Executive Producer Rob Hanning Executive Producer, Writer Terri Miller Executive Producer Kate Woods Director