Robert Lyle Knepper (born July 8, 1959) is an American actor. He is best known for starring as Theodore "T-Bag" Bagwell in the Fox network's drama series, Prison Break, for which he was nominated for a Satellite Award. He has also appeared in the films Hitman (2007) and Transporter 3 (2008), and joined the cast of Heroes for its fourth season. Most recently, he joined the cast of Stargate Universe for its second season, which has started airing in the US in the 2010 fall season. Knepper is set to reprise his role as Theodore "T-Bag" Bagwell in the upcoming series Breakout Kings.
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Known For

Alzarfa
2025

The Lost Princess
Robert Goodman
2025

The Last Supper
Judas
2025

Mindcage
Lt. Owings
2022

The Retaliators
Otto
2022

The Moderator
Agent John Ross
2022

Dark Winds
The Priest · (1 episode)
2022

The Pact
Jay · (6 episodes)
2022

WarHunt
Sergeant Brewer
2022

Nova Vita
Mr. Chinzano · (10 episodes)
2021

Lena and Snowball
Percy
2021

Redemption Day
Mysterious Oil Lobbyist
2021

The Trapped
Victor
2020

Battle of Defense 2
2020

Battle of Defense
2020

S.W.A.T.
2019

Voice of the Nation
2019

1st Born
Joe
2019

Edge of Fear
Victor Novak
2018

Frat Pack
Kush
2018

Twin Peaks: The Phenomenon
Self
2017

Tell It Martin
Self
2017

The Polish Accountant
Self
2017

The Number of Completion
Self
2017

A Bloody Finger in Your Mouth
Self
2017

Dating Game Killer
Detective Jim Hamell
2017

The Orville
Hamelac · (1 episode)
2017

Badsville
Mr. Gavin
2017

Carousel
Wallace
2017

Jack Reacher: Never Go Back
General Harkness
2016

Hard Target 2
Jonah Aldrich
2016

Where is Rocky II?
Cal Joshua (segment "Monument One")
2016

Cold Deck
Turk
2015

The Hunger Games: Mockingjay - Part 2
Antonius
2015

Texas Rising
Empresario Buckley · (5 episodes)
2015

The Hoarder
Vince
2015

iZombie
Angus McDonough · (15 episodes)
2015

The Mockingjay Lives: The Making of the Hunger Games: Mockingjay Part 1
Self (Antonius)
2015

The Hunger Games: Mockingjay - Part 1
Antonius
2014

Ride
Peter
2014

The Flash
William Tockman / Clock King · (1 episode)
2014

Mob City
Sid Rothman · (6 episodes)
2013

The Blacklist
The Courier · (1 episode)
2013

Percy Jackson: Sea of Monsters
Kronos
2013

R.I.P.D.
Nawlicki
2013

Cult
Billy Grimm · (13 episodes)
2013

Seal Team Six: The Raid on Osama Bin Laden
Lieutenant Commander
2012

Arrow
William Tockman / Clock King · (1 episode)
2012

My Way
Frank Sinatra
2012

American Horror Story
Lieutenant · (1 episode)
2011

Homeland
Jamie McClendon · (5 episodes)
2011

Earth's Final Hours
John Streich
2011

Breakout Kings
Theodore 'T-Bag' Bagwell · (1 episode)
2011

Shameless
Rod · (2 episodes)
2011

Burning Daylight
Burning Daylight
2010

Hawaii Five-0
IA Detective Rex Coughlin · (2 episodes)
2010

Stargate Universe
Simeon · (6 episodes)
2009

Live from Studio Five
Self · (1 episode)
2009

Prison Break: The Final Break
Theodore 'T-Bag' Bagwell
2009

The Day the Earth Stood Still
Colonel
2008

Transporter 3
Johnson
2008

Turok: Son of Stone
Chichak
2008

Hitman
Yuri Marklov
2007

Heroes
Samuel Sullivan · (19 episodes)
2006

Criminal Minds
Rhett Walden · (1 episode)
2005

Good Night, and Good Luck.
Don Surine
2005

Prison Break
Theodore 'T-Bag' Bagwell · (88 episodes)
2005

Hostage
Wil Bechler
2005

Point Pleasant
(1 episode)
2005

Species III
Dr. Abbot
2005

NCIS
Benson Long · (1 episode)
2003

Carnivàle
Tommy Dolan · (12 episodes)
2003

Presidio Med
Sean · (5 episodes)
2002

CSI: Miami
Freddy Coleman · (1 episode)
2002

Law & Order: Criminal Intent
Dr. Peter Kelmer · (1 episode)
2001

Thieves
Special Agent Shue · (10 episodes)
2001

Jackie, Ethel, Joan: The Women of Camelot
Robert F. Kennedy
2001

Jackie, Ethel, Joan: The Women of Camelot
Robert F. Kennedy · (2 episodes)
2001

Lady in the Box
2001

Love & Sex
Gerard Boussard
2000

Absence of the Good
Glenn Dwyer
1999

Harsh Realm
(1 episode)
1999

The West Wing
Morgan Ross · (1 episode)
1999

Kidnapped in Paradise
1999

Brimstone
Assistant D.A. Stewart Lambert · (1 episode)
1998

Seven Days
(1 episode)
1998

Jaded
Freddy
1998

Phantoms
Agent Wilson
1998

The Stringer
1998

The Visitor
Alex Burton · (1 episode)
1997

The Undercover Kid
Bo the Dog
1997
You Are Here
Jack
1997

Everyone Says I Love You
Greg
1996

Profiler
(1 episode)
1996
MugShot
Joe
1996

Voice from the Grave
Milosh
1996

Dead of Night
Christian
1996

New York News
ex-con · (1 episode)
1995

Search and Destroy
Daniel Strong
1995

Star Trek: Voyager
Gaul · (1 episode)
1995

ER
Keith Reynolds · (1 episode)
1994

Under Heat
Milo
1994

When the Bough Breaks
Lt. Jimmy Creedmore
1994

Getting Out
Carl
1994

Pointman
Johnny
1994

Zelda
Wilson
1993

Doorways
Thane
1993

Red Shoe Diaries 2: Double Dare
Nick Willard (archive footage)
1993

Gas Food Lodging
Dank
1992

Red Shoe Diaries
Nick Willard · (1 episode)
1992

Where the Day Takes You
Rock Singer
1992

Perry Mason: The Case of the Fatal Fashion
Kim Weatherly
1991

Session Man
Torrey Cole
1991

Commando Earth Force
Dr. Peter Roland
1990

E.A.R.T.H. Force
Dr. Peter Roland · (6 episodes)
1990

Law & Order
Daniel "Igor" Smith · (1 episode)
1990

Young Guns II
Deputy Carlyle
1990

Twin Peaks
Rodney Mitchum · (6 episodes)
1990

Snoops
Steve Shaver · (1 episode)
1989

Renegades
Marino
1989

China Beach
(2 episodes)
1988

D.O.A.
Nicholas Lang
1988

Made in Heaven
Orrin
1987

Star Trek: The Next Generation
Wyatt Miller · (1 episode)
1987

Tour of Duty
Allen · (1 episode)
1987

Police Story: The Freeway Killings
Karl James
1987

Wild Thing
Wild Thing
1987

That's Life!
Steve Larwin
1986

L.A. Law: Pilot
Georgia/George Buckner
1986

L.A. Law
George "Georgia" Buckner · (2 episodes)
1986

L.A. Law
David Orcott · (1 episode)
1986

The Twilight Zone
(segment "Joy Ride") · (1 episode)
1985

The Twilight Zone
(segment "Private Channel") · (1 episode)
1985

Murder, She Wrote
Charles George Drexler · (1 episode)
1984

Murder, She Wrote
Owen McLaglen · (1 episode)
1984

Murder, She Wrote
Robbie Dorow · (1 episode)
1984

Doorways
Thane · (1 episode)