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 Ronnie Steadman Guest Star Emanuel Loarca Guest Star Michael Chieffo Guest Star Anne-Marie Johnson Guest Star Matthew Borlenghi Guest Star Rick Cosnett Guest Star Brian Poth Guest Star Benjamin Benitez Guest Star R. J. Walker Guest Star Terence Paul Winter Executive Producer Alexi Hawley Executive Producer Rob Bowman Executive Producer Rob Hanning Executive Producer Armyan Bernstein Executive Producer Jim Adler Writer Adam Frost Writer Nancy Kiu Writer John Terlesky Director