Nathan Fillion Richard Castle Actor Stana Katic NYPD Captain Kate Beckett Actor Tamala Jones Lanie Parish Actor Jon Huertas NYPD Detective Javier Esposito Actor Seamus Dever NYPD Detective Kevin Ryan Actor Molly C. Quinn Alexis Castle Actor Susan Sullivan Martha Rodgers Actor Toks Olagundoye Hayley Actor Sunkrish Bala Guest Star Geoff Pierson Guest Star Christine Adams Guest Star Kelly Rowan Guest Star Curtis Hamilton Guest Star Terence Paul Winter Executive Producer Alexi Hawley Executive Producer Rob Bowman Executive Producer, Director Rob Hanning Executive Producer Armyan Bernstein Executive Producer Chad Gomez Creasey Writer