Seth Gilliam is an American actor who portrays Alan Deaton on Teen Wolf.


Gilliam graduated from State University of New York at Purchase in 1990. Gilliam has had a number of recurring roles on television, including during the seventh season of The Cosby Show as Aaron Dexter, boyfriend of Erika Alexander's character, and as Alan Deaton on Teen Wolf.[1] His most prominent role, however, has been on The Wire. In 2008, he attracted attention for criticizing the show being overlooked for Emmy nominations despite its critical success.[2] He has also had a number of guest roles in other shows such as CSI: Miami, Nurse Jackie, Skins, Person of Interest, and The Good Wife.[3] His film credits include Private Sugar Watkins in the 1997 action film Starship Troopers and Sergeant Steven Altameyer in the 1996 film Courage Under Fire. He played Clayton Hughes on Oz. Gilliam has also acted on stage, playing Prince Edward in a 1993 production of Richard III, and as the lead in the Commonwealth Shakespeare Company's 2010 production of Othello[4] and the 2011 production of Othello at Houston Shakespeare Festival directed by his wife Leah C. Gardiner. He also played Anthony in Anthony and Cleopatra for Houston Shakespeare Festival also directed by his wife. He has stated that he prefers acting on the stage although he loves his work in film and television: "Acting for the stage is a lot more fun to do. There is instant communication with the audience. An actor can tell whether or not he or she is connecting with an audience or whether they understand what's going on."[5] In May 2014, Gilliam was cast as Gabriel Stokes in the fifth season of AMC's The Walking Dead and continues to play Dr. Deaton in Teen Wolf for MTV.




Year Title Role Notes
1992 In the Eyes of a Stranger Television film
1993 Joey Breaker Jeremy Breaker
1993 Mr. Wonderful ER Doctor
1994 Assault at West Point: The Court-Martial of Johnson Whittaker Cadet Johnson C. Whittaker Television film
1994 The Hardest Part Derek Short film
1995 Jefferson in Paris James Hemings
1996 Courage Under Fire Altameyer
1997 Starship Troopers Sugar Watkins
1997 Tar Tyrone
2000 Punks Marcus
2002 Personal Velocity: Three Portraits Vincent
2005 The Great Wonderful Clayton Segment: "Emme's Story"
2008 Sympathetic Details Raymond
2009 The People v. Leo Frank Jim Conley
2009 Did You Hear About the Morgans? U.S. Marshal Lasky
2010 Betrayed Roger Waite Short film
2011 Stake Out: Atlantic Salmon Rivers Short film
2014 Still Alice Frederic Johnson
2015 Police State Officer Grady


Year Title Role Notes
1990–1991 The Cosby Show Aaron Dexter 3 episodes
1992 Law & Order Babatunde Amoda Episode: "Consultation"
1999–2001 Oz Clayton Hughes 17 episodes
2002–2008 The Wire Ellis Carver 60 episodes
2005 Law & Order: Trial by Jury A.D.A. Terence Wright 4 episodes
2007 The Bronx is Burning Paul Blair Episode: "Time for a Change?"
2007–2008 Law & Order: Criminal Intent Detective Daniels 4 episodes
2009 Damages Mark Waters Episode: "I Knew Your Pig"
2009 CSI: Miami Aaron Nolan Episode: "Flight Risk"
2009 Mercy Police Officer Episode: "Destiny, Meet My Daughter, Veronica"
2010 Nurse Jackie Dr. Lindsey Episode: "Candyland"
2010 Law & Order Michael's Attorney Episode: "Immortal"
2011 The Good Wife Jacob Rickter Episode: "Closing Arguments"
2011 Svetlana Tomas Episode: "Milking It"
2011–present Teen Wolf Dr. Alan Deaton Recurring ; 31 episodes
2012 Person of Interest Detective Des Franklin Episode: "Identity Crisis"
2012 Homeland Chapman Episode: "A Gettysburg Address"
2013 Criminal Minds Lyle Johnson Episode: "Strange Fruit"
2014–present The Walking Dead Gabriel Stokes Series regular; 10 episodes


Season One

Season Two

Season Three

Season Four

Season Five


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