Nathan Fillion Richard Castle Actor Stana Katic NYPD Captain Kate Beckett Actor Susan Sullivan Martha Rodgers Actor Molly C. Quinn Alexis Castle Actor Penny Johnson Capt. Victoria Gates Actor Tamala Jones Lanie Parish Actor Jon Huertas NYPD Detective Javier Esposito Actor Seamus Dever NYPD Detective Kevin Ryan Actor Christine Woods Guest Star Tim Guinee Guest Star John Ruby Guest Star Walter Perez Guest Star Matthew Carey Guest Star Michael Rose Guest Star Samuel Child Guest Star Gilbert Owuor Guest Star Andrew W. Marlowe Executive Producer Rob Bowman Executive Producer Laurie Zaks Executive Producer David Amann Executive Producer Shalisha Francis Writer Paul Holahan Director