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 Rocco DiSpirito Himself Guest Star Arye Gross M.E. Sidney Perlmutter Guest Star Julie Gonzalo Madison Queller Guest Star Suzy Nakamura Jennifer Wong Guest Star Max Greenfield David Nicolaides Guest Star Erin Cahill Cecily Burkett Guest Star Michael Trucco Detective Tom Demming Guest Star Richard Gleason Wesley Slade Guest Star Andrew W. Marlowe Executive Producer Armyan Bernstein Executive Producer Barry Schindel Executive Producer Rob Bowman Executive Producer Laurie Zaks Executive Producer Terri Miller Writer Ron Underwood Director