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 Brianna Brown Guest Star Ivan Sergei Guest Star Gregory Zarian Scott Galloway Guest Star Audrey Marie Anderson Guest Star Andrew W. Marlowe Executive Producer David Amann Executive Producer Rob Bowman Executive Producer Armyan Bernstein Executive Producer Rob Hanning Executive Producer Terri Miller Executive Producer Terence Paul Winter Writer Amanda Johns Writer Thomas J. Wright Director