Michael C. Hall Dexter Morgan Actor, Executive Producer Jennifer Carpenter Debra Morgan Actor C.S. Lee Vince Masuka Actor David Zayas Angel Batista Actor James Remar Harry Morgan Actor Desmond Harrington Joey Quinn Actor Geoff Pierson Captain Tom Matthews Actor Aimee Garcia Jamie Batista Actor Luna Lauren Velez Lt. Maria LaGuerta Actor Christina Robinson Astor Actor Preston Bailey Cody Actor Julia Stiles Lumen Ann Pierce Actor Julie Benz Rita Bennett Actor John Lithgow Arthur Mitchell Actor Devon Graye Teenage Dexter Actor Dominic Janes Young Dexter Actor Cristos Norberto Cervantes Actor Rudolf Martin Carlos Guerrero Actor Scott William Winters Detective McNamara Actor Valerie Cruz Syl Prado Actor Kristin Dattilo Det. Barbara Gianna Actor Jason Manuel Olazabal Ramon Prado Actor David Ramsey Anton Actor Jimmy Smits Miguel Prado Actor Erik King Sgt. Doakes Actor Keith Carradine Agent Lundy Actor JoBeth Williams Gail Actor Jaime Murray Lila Actor John Goldwyn Executive Producer Sara Colleton Executive Producer Scott Buck Executive Producer Manny Coto Executive Producer Tim Schlattmann Executive Producer Wendy West Executive Producer Jace Richdale Executive Producer