Michael O'Neill

The West Wing

as Ron Butterfield

Episodes: 16

First Aired: Sep 22, 1999

Rectify

as Senator Roland Foulkes

Episodes: 15

First Aired: Apr 22, 2013

Extant

as Alan Sparks

Episodes: 13

First Aired: Jul 09, 2014

Bates Motel

as Nick Ford

Episodes: 8

First Aired: Mar 18, 2013

Echoes

as Victor McCleary

Episodes: 7

First Aired: Aug 19, 2022

Scandal

as Lonnie Mencken

Episodes: 5

First Aired: Apr 05, 2012

Tom Clancy's Jack Ryan

as Senator Mitchell Chapin

Episodes: 5

First Aired: Aug 30, 2018

Messiah

as Cameron Collier

Episodes: 5

First Aired: Jan 01, 2020

Grey's Anatomy

as Gary Clark

Episodes: 4

First Aired: Mar 27, 2005

Boston Public

as Dr. Bernard Colbert

Episodes: 4

First Aired: Oct 23, 2000

The Nine

as Pete Burton

Episodes: 3

First Aired: Oct 04, 2006

NCIS

as Riley McCallister

Episodes: 3

First Aired: Sep 23, 2003

Shooter

as Ray Brooks

Episodes: 3

First Aired: Nov 15, 2016

S.W.A.T.

as Carl Luca

Episodes: 3

First Aired: Nov 02, 2017

Commander in Chief

as Congressman Wilcox

Episodes: 2

First Aired: Sep 27, 2005

Outer Range

as Judge Pettigrew

Episodes: 2

First Aired: Apr 14, 2022

Happy's Place

as Jim Jackoway

Episodes: 2

First Aired: Oct 18, 2024

This Is Us

as Arlo

Episodes: 1

First Aired: Sep 20, 2016

JAG

as Commander Bradley

Episodes: 1

First Aired: Sep 23, 1995

The X-Files

as Patrol Captain Van Gelder

Episodes: 1

First Aired: Sep 10, 1993

Roswell

as Philip Evans

Episodes: 1

First Aired: Oct 06, 1999

Ghost Whisperer

as Nolan

Episodes: 1

First Aired: Sep 23, 2005

The Glades

as Trent Staley

Episodes: 1

First Aired: Jul 11, 2010

Rizzoli & Isles

as Jonathan McKnight

Episodes: 1

First Aired: Jul 12, 2010

24

as Richard Welsh

Episodes: 1

First Aired: Nov 06, 2001

24

as Richard Walsh

Episodes: 1

First Aired: Nov 06, 2001

FlashForward

as CIA Director Keller

Episodes: 1

First Aired: Sep 24, 2009

Law & Order: LA

as Jeb Monroe

Episodes: 1

First Aired: Sep 29, 2010

Diagnosis: Murder

as Sheriff Buck O'Hara

Episodes: 1

First Aired: Oct 29, 1993

Manhattan

as Psychiatrist

Episodes: 1

First Aired: Jul 27, 2014

Sons of Anarchy

as Anthony Franklin

Episodes: 1

First Aired: Sep 03, 2008

The Mentalist

as Sheriff Nelson

Episodes: 1

First Aired: Sep 23, 2008

11.22.63

as Arliss Price

Episodes: 1

First Aired: Feb 15, 2016

Fringe

as Sheriff Velchik

Episodes: 1

First Aired: Sep 09, 2008

The Resident

as Joshua Williams

Episodes: 1

First Aired: Jan 21, 2018

Prison Break

as Herb Stanton

Episodes: 1

First Aired: Aug 29, 2005

NCIS: Los Angeles

as Ret. U.S. Army General Richard Collins

Episodes: 1

First Aired: Sep 22, 2009

ER

as Col. Ken Kilner

Episodes: 1

First Aired: Sep 19, 1994

The Unit

as Ron Cheals

Episodes: 1

First Aired: Mar 07, 2006

Criminal Minds

as Det. Yarbough

Episodes: 1

First Aired: Sep 22, 2005

Fire Country

as Harlan Denbo

Episodes: 1

First Aired: Oct 07, 2022

Leverage

as Judge Roy

Episodes: 1

First Aired: Dec 07, 2008

The Romanoffs

as Ron Hopkins

Episodes: 1

First Aired: Oct 11, 2018

Without a Trace

as Thomas Shannon

Episodes: 1

First Aired: Sep 26, 2002

The Shining

as Daniel Edwards (uncredited)

Episodes: 1

First Aired: Apr 27, 1997

Crossing Jordan

as Chris Benz

Episodes: 1

First Aired: Sep 24, 2001

LAX

as Alonso Mathews

Episodes: 1

First Aired: Sep 13, 2004

Millennium

as County Prosecutor Calvin Smith

Episodes: 1

First Aired: Oct 25, 1996