Cast & creator
Seth Gilliam
Best known for Law & Order, Law & Order, Criminal Minds
Seth Gilliam (November 5, 1968) is an American screen and stage actor. He is most known as Father Gabriel on AMC's post-apocalyptic series The Walking Dead, first appearing in Season 5. He is also known for his HBO television roles, first as corrections officer-turned-prisoner Clayton Hughes on Oz, and later as Baltimore police detective promoted to Sergeant, Ellis Carver on The Wire. On both of these series, he co-starred with Lance Reddick and J.D. Williams. Another of his major recurring roles was on the TV series Teen Wolf as Dr. Alan Deaton. He had a recurring role during the seventh season of The Cosby Show as Aaron Dexter (boyfriend of Erika Alexander's character Pam), Law and Order: Criminal Intent, and Law and Order: Trial by Jury. He's had a number of guest roles in other shows such as CSI: Miami, Nurse Jackie, Skins, Person of Interest, The Good Wife, and Bull. His feature film credits include his role as Sergeant Steven Altameyer in Courage Under Fire (1996) and Private Sugar Watkins in the action movie Starship Troopers (1997). His other films include Personal Velocity (2002), Did You Hear About the Morgans? (2009), and Still Alice (2014).
Also known as: Сет Гиллиам
29
film credits
22
television credits
51
1984–2025 · acting roles
6.7
average across scored titles
Signature credits
Known for
Across film & television
Filmography (51)
Showing 51 of 51 credits
Law & Order
Michael´s Attorney
1990Law & Order
Babatunde Amoda
1990
Criminal Minds
Lyle Johnson
2005
The Blacklist
Larry Whitaker
2013
Law & Order: Criminal Intent
Detective Daniels
2001
CSI: Miami
Aaron Nolan
2002
The Walking Dead
Gabriel Stokes
2010
The Good Wife
Jacob Rickter
2009
Person of Interest
Des Franklin
2011
Elementary
Dr. Ira Wallace
2012
Homeland
Chaplin
2011
Teen Wolf
Alan Deaton
2011
The Wire
Ellis Carver
2002
The Cosby Show
Aaron Dexter
1984
Bull
Dr. Poulson
2016
Damages
Mark Waters
2007
Oz
Clayton Hughes
1997
Nurse Jackie
Dr. Lindsey
2009
City on a Hill
Jasper Fields
2019
Law & Order: Trial by Jury
Terence Wright
2005
The Walking Dead: The Ones Who Live
Gabriel Stokes
2024
Starship Troopers
Private Sugar Watkins
1997
Suits LA
Dean Harris
2025
Teen Wolf: The Movie
Dr. Alan Deaton
2023
Still Alice
Frederic Johnson
2014
Courage Under Fire
Stephen Altameyer
1996
Did You Hear About the Morgans?
U.S. Marshal Lasky
2009
Change in the Air
Officer Payne
2018
Jefferson in Paris
James Hemings
1995
Personal Velocity
Vincent
2002
Assault at West Point: The Court-Martial of Johnson Whittaker
Cadet Johnson C. Whittaker
1994
The Wire Odyssey
Self
2007
The Great New Wonderful
Clayton
2005Sympathetic Details
Raymond
2008
Stakeout (Short)
Punks
Marcus
2000
The Wire: The Last Word
Self
2007
Mr. Wonderful
Emergency Room Doctor (unconfirmed)
1993
In the Eyes of a Stranger
1992
The Zombie Wedding
Reverend Harry Crump
2023
Heading Home
Willie
1995
The Skinny
Testing Van Doc
2012
Ride or Die
Creon
2025
Joey Breaker
Jeremy Brasher
1993
The People v. Leo Frank
Jim Conley
2009
Silver Lake
Jeff
2018
The Lady of the Lake
Adam Schultz
2024
Tar
Tyrone
1996Betrayed
Roger Waite
2010
Tapping the Wire
Self
2007
Police State
Officer Grady
2018