Thomas Ellis Gibson (born July 3, 1962) is an American actor and director. He portrayed Daniel Nyland in the CBS series Chicago Hope, Greg Montgomery on the ABC series Dharma & Greg, and Aaron Hotchner on the CBS series Criminal Minds (2005–2016).
Known For

The Flintstones in Viva Rock Vegas
Chip Rockefeller
2000
The Writer's Bible
The Writer

Shadow Wolves
Colonel Branson
2019

Axis
Joseph (voice)
2017

Son of Batman
Slade Wilson / Deathstroke (voice)
2014

Hot in Cleveland
Tom · (2 episodes)
2010

I'll Believe You
Kyle Sweeney
2007

In from the Night
Aiden Byrnes
2006

Berkeley
Thomas the Valet
2005

Criminal Minds
Aaron Hotchner · (257 episodes)
2005

Come Away Home
Gary
2005

Category 6: Day of Destruction
Mitch Benson
2004

Category 6: Day of Destruction
Mitch Benson · (2 episodes)
2004

Raising Waylon
Reg
2004

Two and a Half Men
Greg · (1 episode)
2003

Evil Never Dies
Detective Mark Ryan
2003

Manhood
Faith's Attorney
2003

Brush with Fate
Richard
2003

What About Joan?
(1 episode)
2001

The Lost Empire
Nicholas Orton · (2 episodes)
2001

Jack the Dog
Faith's Attorney
2001

Stardom
Renny Ohayon
2000

Psycho Beach Party
Kanaka
2000

Eyes Wide Shut
Carl
1999

A Will of their Own
James MacClaren · (2 episodes)
1998

Hollywood Squares
Self - Panelist · (5 episodes)
1998

Hollywood Squares
(5 episodes)
1998

More Tales of the City
Beauchamp Day · (4 episodes)
1998

Nightmare Street
Matt Westbrook
1998

The Devil's Child
Alex
1997

Dharma & Greg
Greg Montgomery · (119 episodes)
1997

The View
Self · (1 episode)
1997

The Next Step
Bartender
1997

The Inheritance
James Percy
1997

To Love, Honor and Deceive
Matthew Carpenter
1996

Night Visitors
Ross Williams
1996

The Real Adventures of Jonny Quest
Paul Mornay (voice) · (1 episode)
1996

Caroline in the City
Willard Stevens · (1 episode)
1995

Secrets
Hailus Tuckman
1995

Sleep with Me
Nigel
1994

Chicago Hope
Danny Nyland · (72 episodes)
1994

Men of War
Warren
1994

Barcelona
Dickie Taylor
1994

Love & Human Remains
David
1994

Duckman
Thomas Gibson (voice) · (1 episode)
1994

Tales of the City
Beauchamp Day · (5 episodes)
1993

Late Night with Conan O'Brien
Self · (1 episode)
1993

The Age of Innocence
Stage Actor
1993

Far and Away
Stephen Chase
1992

LIVE with Kelly and Mark
(1 episode)
1988

Lincoln
William Sprague · (2 episodes)
1988

Leg Work
Robbie Richardson · (1 episode)
1987

Another World
Sam Fowler · (1547 episodes)
1964

Hallmark Hall of Fame
Richard · (1 episode)
1951

Hallmark Hall of Fame
Aiden Byrnes · (1 episode)
1951