TV Shows (Acting Roles)
Ages in TV shows are based off the first air date and may not be accurate. View individual episode details for accurate agesHappy's Place
Michael O'Neill was
77+ in Happy's Place
as 'Jim Jackoway'.
First Air Date
Fri, Oct 18 2024
Fire Country
Michael O'Neill was
75+ in Fire Country
as 'Harlan Denbo'.
First Air Date
Fri, Oct 07 2022
Echoes
Michael O'Neill was
75+ in Echoes
as 'Victor McCleary'.
First Air Date
Fri, Aug 19 2022
Outer Range
Michael O'Neill was
74+ in Outer Range
as 'Judge Pettigrew'.
First Air Date
Thu, Apr 14 2022
Messiah
Michael O'Neill was
72+ in Messiah
as 'Cameron Collier'.
First Air Date
Wed, Jan 01 2020
The Romanoffs
Michael O'Neill was
71+ in The Romanoffs
as 'Ron Hopkins'.
First Air Date
Thu, Oct 11 2018
Tom Clancy's Jack Ryan
Michael O'Neill was
71+ in Tom Clancy's Jack Ryan
as 'Senator Mitchell Chapin'.
First Air Date
Thu, Aug 30 2018
The Resident
Michael O'Neill was
70+ in The Resident
as 'Joshua Williams'.
First Air Date
Sun, Jan 21 2018
S.W.A.T.
Michael O'Neill was
70+ in S.W.A.T.
as 'Carl Luca'.
First Air Date
Thu, Nov 02 2017
Shooter
Michael O'Neill was
69+ in Shooter
as 'Ray Brooks'.
First Air Date
Tue, Nov 15 2016
This Is Us
Michael O'Neill was
69+ in This Is Us
as 'Arlo'.
First Air Date
Tue, Sep 20 2016
11.22.63
Michael O'Neill was
68+ in 11.22.63
as 'Arliss Price'.
First Air Date
Mon, Feb 15 2016
Manhattan
Michael O'Neill was
67+ in Manhattan
as 'Psychiatrist'.
First Air Date
Sun, Jul 27 2014
Extant
Michael O'Neill was
67+ in Extant
as 'Alan Sparks'.
First Air Date
Wed, Jul 09 2014
Rectify
Michael O'Neill was
65+ in Rectify
as 'Senator Roland Foulkes'.
First Air Date
Mon, Apr 22 2013
Bates Motel
Michael O'Neill was
65+ in Bates Motel
as 'Nick Ford'.
First Air Date
Mon, Mar 18 2013
Scandal
Michael O'Neill was
64+ in Scandal
as 'Lonnie Mencken'.
First Air Date
Thu, Apr 05 2012
Law & Order: LA
Michael O'Neill was
63+ in Law & Order: LA
as 'Jeb Monroe'.
First Air Date
Wed, Sep 29 2010
Rizzoli & Isles
Michael O'Neill was
63+ in Rizzoli & Isles
as 'Jonathan McKnight'.
First Air Date
Mon, Jul 12 2010
The Glades
Michael O'Neill was
63+ in The Glades
as 'Trent Staley'.
First Air Date
Sun, Jul 11 2010
FlashForward
Michael O'Neill was
62+ in FlashForward
as 'CIA Director Keller'.
First Air Date
Thu, Sep 24 2009
NCIS: Los Angeles
Michael O'Neill was
62+ in NCIS: Los Angeles
as 'Ret. U.S. Army General Richard Collins'.
First Air Date
Tue, Sep 22 2009
Leverage
Michael O'Neill was
61+ in Leverage
as 'Judge Roy'.
First Air Date
Sun, Dec 07 2008
The Mentalist
Michael O'Neill was
61+ in The Mentalist
as 'Sheriff Nelson'.
First Air Date
Tue, Sep 23 2008
Fringe
Michael O'Neill was
61+ in Fringe
as 'Sheriff Velchik'.
First Air Date
Tue, Sep 09 2008
Sons of Anarchy
Michael O'Neill was
61+ in Sons of Anarchy
as 'Anthony Franklin'.
First Air Date
Wed, Sep 03 2008
The Nine
Michael O'Neill was
59+ in The Nine
as 'Pete Burton'.
First Air Date
Wed, Oct 04 2006
The Unit
Michael O'Neill was
58+ in The Unit
as 'Ron Cheals'.
First Air Date
Tue, Mar 07 2006
Commander in Chief
Michael O'Neill was
58+ in Commander in Chief
as 'Congressman Wilcox'.
First Air Date
Tue, Sep 27 2005
Ghost Whisperer
Michael O'Neill was
58+ in Ghost Whisperer
as 'Nolan'.
First Air Date
Fri, Sep 23 2005
Criminal Minds
Michael O'Neill was
58+ in Criminal Minds
as 'Det. Yarbough'.
First Air Date
Thu, Sep 22 2005
Prison Break
Michael O'Neill was
58+ in Prison Break
as 'Herb Stanton'.
First Air Date
Mon, Aug 29 2005
Grey's Anatomy
Michael O'Neill was
57+ in Grey's Anatomy
as 'Gary Clark'.
First Air Date
Sun, Mar 27 2005
LAX
Michael O'Neill was
57+ in LAX
as 'Alonso Mathews'.
First Air Date
Mon, Sep 13 2004
NCIS
Michael O'Neill was
56+ in NCIS
as 'Riley McCallister'.
First Air Date
Tue, Sep 23 2003
Without a Trace
Michael O'Neill was
55+ in Without a Trace
as 'Thomas Shannon'.
First Air Date
Thu, Sep 26 2002
24
Michael O'Neill was
54+ in 24
as 'Richard Welsh, Richard Walsh'.
First Air Date
Tue, Nov 06 2001
Crossing Jordan
Michael O'Neill was
54+ in Crossing Jordan
as 'Chris Benz'.
First Air Date
Mon, Sep 24 2001
Roswell
Michael O'Neill was
52+ in Roswell
as 'Philip Evans'.
First Air Date
Wed, Oct 06 1999
The West Wing
Michael O'Neill was
52+ in The West Wing
as 'Ron Butterfield'.
First Air Date
Wed, Sep 22 1999
The Shining
Michael O'Neill was
49+ in The Shining
as 'Daniel Edwards (uncredited)'.
First Air Date
Sun, Apr 27 1997
JAG
Michael O'Neill was
48+ in JAG
as 'Commander Bradley'.
First Air Date
Sat, Sep 23 1995
ER
Michael O'Neill was
47+ in ER
as 'Col. Ken Kilner'.
First Air Date
Mon, Sep 19 1994
Chicago Hope
Michael O'Neill was
47+ in Chicago Hope
First Air Date
Sun, Sep 18 1994
One West Waikiki
Michael O'Neill was
47+ in One West Waikiki
First Air Date
Thu, Aug 04 1994
Diagnosis: Murder
Michael O'Neill was
46+ in Diagnosis: Murder
as 'Sheriff Buck O'Hara'.
First Air Date
Fri, Oct 29 1993
The X-Files
Michael O'Neill was
46+ in The X-Files
as 'Patrol Captain Van Gelder'.
First Air Date
Fri, Sep 10 1993