Nathan Fillion Richard Castle Actor Stana Katic NYPD Captain Kate Beckett Actor Tamala Jones Lanie Parish Actor Jon Huertas NYPD Detective Javier Esposito Actor Seamus Dever NYPD Detective Kevin Ryan Actor Molly C. Quinn Alexis Castle Actor Susan Sullivan Martha Rodgers Actor Toks Olagundoye Hayley Actor Frank Tran Guest Star Carolyn Stotesbery Guest Star John Ducey Guest Star Denise Crosby Guest Star Erich Wildpret Guest Star Alexandra Bokyun Chun Guest Star T.J. Ramini Guest Star Layla Alizada Guest Star Terence Paul Winter Executive Producer Alexi Hawley Executive Producer Rob Bowman Executive Producer Rob Hanning Executive Producer Armyan Bernstein Executive Producer Bill Roe Director Stephanie Hicks Writer