Seth Gilliam
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).
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Movies (29)
Ride or Die
2025 · Creon
The Lady of the Lake
2024 · Adam Schultz
The Zombie Wedding
2023 · Reverend Harry Crump
Teen Wolf: La Película
2023 · Dr. Alan Deaton
Silver Lake
2018 · Jeff
Vientos De Cambio
2018 · Officer Payne
Police State
2018 · Officer Grady
Siempre Alice
2014 · Frederic Johnson
The Skinny
2012 · Testing Van Doc
Betrayed
2010 · Roger Waite
Did You Hear About the Morgans?
2009 · U.S. Marshal Lasky
The People v. Leo Frank
2009 · Jim Conley
Sympathetic Details
2008 · Raymond
The Wire: The Last Word
2007 · Self
The Wire Odyssey
2007 · Self
Tapping the Wire
2007 · Self
The Great New Wonderful
2005 · Clayton
Personal Velocity
2002 · Vincent
Punks
2000 · Marcus
Starship Troopers
1997 · Private Sugar Watkins
Tar
1996 · Tyrone
Courage Under Fire
1996 · Stephen Altameyer
Heading Home
1995 · Willie
Jefferson in Paris
1995 · James Hemings
Assault at West Point: The Court-Martial of Johnson Whittaker
1994 · Cadet Johnson C. Whittaker
Mr. Wonderful
1993 · Emergency Room Doctor (unconfirmed)
Joey Breaker
1993 · Jeremy Brasher
In the Eyes of a Stranger
1992
Stakeout (Short)
TV shows (21)
Suits LA
2025 · Dean Harris
The Walking Dead: The Ones Who Live
2024 · Gabriel Stokes
City on a Hill
2019 · Jasper Fields
Bull
2016 · Dr. Poulson
The Blacklist
2013 · Larry Whitaker
Elementary
2012 · Dr. Ira Wallace
Homeland
2011 · Chaplin
Person of Interest
2011 · Des Franklin
Lobo Adolescente
2011 · Alan Deaton
The Walking Dead
2010 · Gabriel Stokes
La esposa ejemplar
2009 · Jacob Rickter
Nurse Jackie
2009 · Dr. Lindsey
Damages
2007 · Mark Waters
Mentes Criminales
2005 · Lyle Johnson
Law & Order: Trial by Jury
2005 · Terence Wright
CSI: Miami
2002 · Aaron Nolan
Los Vigilantes
2002 · Ellis Carver
Law & Order: Criminal Intent
2001 · Detective Daniels
Oz
1997 · Clayton Hughes
Law & Order
1990 · Michael´s Attorney, Babatunde Amoda
The Cosby Show
1984 · Aaron Dexter