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 Stephnie Weir Guest Star Aubrey Deeker Guest Star Kevin Joy Guest Star Charles Mesure Guest Star Chris Caldovino Guest Star Ray Proscia Guest Star Terence Paul Winter Executive Producer Alexi Hawley Executive Producer Rob Bowman Executive Producer Rob Hanning Executive Producer Armyan Bernstein Executive Producer Nancy Kiu Writer Steve Robin Director