Nathan Fillion Richard Castle Actor Stana Katic NYPD Captain Kate Beckett Actor Susan Sullivan Martha Rodgers Actor Molly C. Quinn Alexis Castle Actor Ruben Santiago-Hudson Captain Roy Montgomery Actor Tamala Jones Lanie Parish Actor Jon Huertas NYPD Detective Javier Esposito Actor Seamus Dever NYPD Detective Kevin Ryan Actor Jonathan LaPaglia John Knox Guest Star Michaela McManus Scarlett Price Guest Star J.B. Smoove Norman Jessup Guest Star Danny Nucci Gilbert Mazzara Guest Star Charles Rahi Chun Paul Cho Guest Star Shari Headley Nicole Cameron Guest Star Ray Laska Dan Tonelli Guest Star Andrew W. Marlowe Executive Producer Armyan Bernstein Executive Producer Barry Schindel Executive Producer Rob Bowman Executive Producer Laurie Zaks Executive Producer Alexi Hawley Writer Bryan Spicer Director