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 Stephen J. Cannell Himself Guest Star Laurel Holloman Sandy Allen Guest Star Elizabeth Ho Amy Saunders Guest Star Robert Gant Rob Bigby Guest Star Michael Connelly Himself Guest Star David Bowe Max Haverstock Guest Star David Meunier Sasha 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