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 Kathleen Rose Perkins Elise Finnegan Guest Star Robert Pine Gerry Finnegan Guest Star David Ramsey Jim Wheeler Guest Star Tyler Hoechlin Dylan Fulton Guest Star Stephanie Faracy Patty Schultz Guest Star Chet Grissom Agent Gray Guest Star Jennifer Riker Sue Vaughn 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