Michael C. Hall Dexter Morgan Actor Julie Benz Rita Bennett Actor Jennifer Carpenter Debra Morgan Actor Erik King Sgt. James Doakes Actor Luna Lauren Velez Lt. Maria LaGuerta Actor David Zayas Angel Batista Actor James Remar Harry Morgan Actor C.S. Lee Vince Masuka Guest Star Geoff Pierson Captain Tom Matthews Guest Star Christina Robinson Astor Bennett Guest Star Daniel Goldman Cody Bennett Guest Star Devon Graye Teenage Dexter Guest Star Christian Camargo Rudy Cooper Guest Star Mark Pellegrino Paul Bennett Guest Star Sam Witwer Neil Perry Guest Star Tony Goldwyn Dr. Emmett Meridian Guest Star, Director Mark Matkevich Alex Guest Star Milauna Jackson Co-ed Guest Star Lauren Gussis Writer