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 Kristoffer Polaha Guest Star Clare Grant Guest Star Darlene Vogel Guest Star Christopher B. Duncan Guest Star Denise Dowse Guest Star Tuc Watkins Guest Star Kassie Wesley DePaiva Guest Star Terence Paul Winter Executive Producer, Writer Alexi Hawley Executive Producer Rob Bowman Executive Producer Rob Hanning Executive Producer Armyan Bernstein Executive Producer Bill Roe Director