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 Nathan Lam Rabbi Guest Star Cynthia Frost Tova Guest Star John Kassir Mr. Dreyfus Guest Star William Allen Young Jerry Camden Guest Star Michael Cassidy Greg McClintock Guest Star Monet Mazur Gina Cowell Guest Star Erin Fleming Amy Porter Guest Star Bo Foxworth Leonard Maloney Guest Star Brea Cola Dr. Imani Phelps Guest Star Allyssa Brooke Dr. Lissa Akerman Guest Star Andrew W. Marlowe Executive Producer Rob Bowman Executive Producer Laurie Zaks Executive Producer David Amann Executive Producer Terence Paul Winter Writer John Terlesky Director