Characters

Dexter Morgan played by Michael C. Hall

Main character 

season 1-8

Debra Morgan played by Jennifer Carpenter

Dexter's sister in law 

season 1-8

Rudy cooper/Brian Moser played by Christian Camargo

Dexter's biological brother, Ice-Truck Killer (main antagonist of season 1)

Season 1, 2 and 6

Angel Batista played by David Zayas

Dexter's friend and colleague from Miami Metro department

Seasons 1-8

Vince Masuka played by C.S. Lee

Dexter's friend and colleague from Miami Metro Department

Seasons 1-8

Harry Morgan played by James Remar

Dexter's father in law

Seasons 1-8

James Doakes played by Erik King

Dexter's superior and colleague from Miami Metro Department

Seasons 1 and 2

Maria LaGuerta played by Lauren Vélez

Dexter's superior, friend and colleague from Miami Metro Department

Seasons 1-7

Lila West played by Jaime Murray

Dexter's temporary girlfriend

Season 2

Rita Bennett/Morgan played by Julie Benz

Dexter's wife

Seasons 1-4

Astor Bennett played by Christina Robinson

Rita Bennett's daughter

Seasons 1-5

Cody Bennett played by Preston Bailey

Rita Bennett's son

Seasons 1-5

Frank Lundy played by Keith Carradine

Agent from FBI who came to solve the Bay-Harbour Killerand (Dexter) later on at Trinity Killer

Seasons 2 and 4

Joey Quinn played by Desmond Harrington

Dexter's friend and colleague from Miami Metro Department

Seasons 2-8

Tom Matthews played by Geoff Pierson

Dexter father's colleague, superior and friend, later on also of Dexter

Seasons 1-4 and 6-8

Paul Bennett played by Mark Pellegrino

Rita Bennett's ex husband also father of Astor and Cody

Seasons 1 and 2

Anton Briggs played by David Ramsey

Debra Morgan's boyfriend

Seasons 3 and 4

Miguel Prado played by Jimmy Smits

Dexter's best friend and antagonist of season 3 

Season 3

Sylvia Prado played by Valerie Cruz

Miguel Prado's wife

Season 3 and 8

Arthur Mitchell played by John Lithgow

Trinity Killer and antagonist of season 4

Season 4

Lumen Pierce played by Julia Stiles

Works with Dexter as vigilantes to kill the group who abused and raped of girls like her

Season 5

Little Chino played by Matthew willig

A killer from that formed part of a geng

Season 2

Harrison Morgan played by Evan George and Luke Andrew Kruntchev and Jadon Wells

Dexter and Rita's son

Season 3-8

Mike Anderson played by Billy Brown

Dexter's colleague brought in new

Seasons 6 and 7

Brother Sam played by Mos Def

Gang member very catholic that becomes Dexter's friend

Season 6

Travis Marshall played by Colin Hanks

Doomsady Killer main antagonist of season 6

Season 6

Isaak Sirko played by Ray Stevenson

main antagonist of season 7, but then Dexter and Isaak work together

Season 7

Angie Miller played by Dana L. Wilson

Colleague of Dexter from Miami Metro Department

Season 7 and 8

Jamie Batista played by Aimee Garcia

Angel Batista's sister

Season 7 and 8

Dr. Evelyn Vogel played by Charlotte Rampling

Creator of Dexter's code later on friend with Dexter

Season 8

Zach Hamilton played by Sam Underwood

Dexter tried to teach him his code because he has the same addiction

Season 8

Oliver Saxon played by Darri Ingolfsson

Brain-surgeon Killer and biological Dr. Vogel's son

Season 8

Hannah McKay played by Yvonne Strahovski

Dexter's girlfriend who will later try to escape with Dexter to Argentina

Season 7 and 8

Camilla Figg played by Margo Martindale

Receptionist at Miami Metro Department, friend and colleague of of Dexter and Harry Morgan

Season 1-3