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 Arye Gross M.E. Sidney Perlmutter Guest Star Michael Trucco Detective Tom Demming Guest Star Stephen J. Cannell Himself Guest Star Dana Delany Special Agent Jordan Shaw Guest Star Leonard Roberts Special Agent Jason Avery Guest Star Scott Cohen Lt. Stan Holliwell Guest Star Dianna Maria Riva Det. Roselyn Karpowski Guest Star Fred Willard Hank McPhee Guest Star Danny Nucci Gilbert Mazzara Guest Star Gareth Williams Wesley Grovner Guest Star Michael Connelly Himself Guest Star Phil LaMarr Dr. Holloway Guest Star Andrew W. Marlowe Executive Producer, Writer Armyan Bernstein Executive Producer Barry Schindel Executive Producer Rob Bowman Executive Producer, Director Laurie Zaks Executive Producer Alexi Hawley Writer Terri Miller Writer Terence Paul Winter Writer Jose Molina Writer David Grae Writer Will Beall Writer René Echevarria Writer Elizabeth Davis Writer Moira Kirland Writer John Terlesky Director Bryan Spicer Director Thomas J. Wright Director Dwight H. Little Director