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 Jay R. Ferguson Dick Coonan Guest Star James Cosmo Finn Rourke Guest Star Scott Paulin Jim Beckett Guest Star Danny Nucci Gilbert Mazzara Guest Star Robert Picardo Dr. Clark Murray Guest Star Eddie Shin Johnny Vong Guest Star Patrick St. Esprit Special Agent Forrest Guest Star Andrew W. Marlowe Executive Producer Armyan Bernstein Executive Producer Barry Schindel Executive Producer Rob Bowman Executive Producer Laurie Zaks Executive Producer Will Beall Writer Thomas J. Wright Director