Aidan Quinn (born March 8, 1959) is an American actor. He made his film debut in Reckless (1984) and has starred in over 80 feature films, including Desperately Seeking Susan (1985), The Mission (1986), Stakeout (1987), All My Sons (1987), Avalon (1990), Benny & Joon (1993), Legends of the Fall (1994), Mary Shelley's Frankenstein (1994), Michael Collins (1996), Practical Magic (1998), Song for a Raggy Boy (2003), Wild Child (2008) and Unknown (2011). He also played Captain Thomas "Tommy" Gregson on the CBS television series Elementary (2012–19).
Quinn has received two Primetime Emmy Award nominations for his performances in the television films An Early Frost (1985) and Bury My Heart at Wounded Knee (2007). Highly active in Irish cinema and the United States, Quinn is a four-time Irish Film and Television (IFTA) Award nominee, winning Best Supporting Actor in a Film for the Conor McPherson film The Eclipse (2009).
Description above from the Wikipedia article Aidan Quinn, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Known For

The Gettysburg Address
Theodore Parker (voice)
2025
Food Fight
Daniel
2025

Rematch
Roger Laver · (6 episodes)
2024

Daughter of the Bride
Bruce
2023

Blacklight
Gabriel Robinson
2022

The American Guest
Theodore Roosevelt · (4 episodes)
2021

Spiked
John Wilson
2021

A Journey to Sundance
Self
2021

Babenco: Tell Me When I Die
Self (archive footage)
2020

Change in the Air
Moody Burkhart
2018

Arthur Miller: Writer
Self (archive footage)
2017

Stay
Dermot
2013

Rushlights
Cameron Brogden
2013

If I Were You
Derek
2013

The Last Keepers
John
2013

Allegiance
Lieutenant Colonel Owens
2012

The Horses of McBride
Matt Davidson
2012

Festival of Lights
Adem
2012

Elementary
Thomas Gregson · (154 episodes)
2012

The Stand Up
Sandy
2012

The Greening of Whitney Brown
Henry Brown
2011

Prime Suspect
Kevin Sweeney · (13 episodes)
2011

Unknown
Martin B.
2011

Across the Line: The Exodus of Charlie Wright
Charlie Wright
2010

Sarah's Key
William Rainsferd
2010

Flipped
Richard Baker
2010

Jonah Hex
Ulysses S. Grant
2010

The 5th Quarter
Steven Abbate
2010

White Collar
Professor George Oswald · (1 episode)
2009

A Shine of Rainbows
Alec
2009

From Ararat to Zion
Narrator
2009

Handsome Harry
Prof. Porter
2009

The Eclipse
Nicholas Holden
2009

Irish Chicago
Self - Host
2009

Wild Child
Gerry Moore
2008
The Prince of Motor City
Charlie Hamilton
2008

Dark Matter
Jacob Reiser
2008

Canterbury's Law
Matt Furey · (6 episodes)
2008

32A
Frank Brennan
2007

Bury My Heart at Wounded Knee
Henry Dawes
2007

The Exonerated
Kerry Max Cook
2006

The Book of Daniel
Daniel Webster · (4 episodes)
2006

Mayday
John Berry
2005

Nine Lives
Henry
2005

Weeds
CEO · (4 episodes)
2005

Empire Falls
David Roby · (2 episodes)
2005

Return to Sender
Frank Nitzche
2004

Shadow of Fear
Detective Scofield
2004

Miracle Run
Douglas Thomas
2004
Proud
Commodore Alfred Lind
2004

See You in My Dreams
Joe F. Brown
2004

Cavedweller
Clint Windsor
2004

Bobby Jones: Stroke of Genius
Harry Vardon
2004

Plainsong
Tom Guthrie
2004

Song for a Raggy Boy
William Franklin
2003

Benedict Arnold: A Question of Honor
Gen. Benedict Arnold
2003

Evelyn
Nick Barron
2002

Stolen Summer
Joe O'Malley
2002

Night Visions
Jeremy Bell (segment "The Passenger List") · (1 episode)
2001

Songcatcher
Tom Bledsoe
2001

The Prince and the Pauper
Miles Hendon
2000

Two of Us
Paul McCartney
2000

Music of the Heart
Brian
1999

Third Watch
John Miller · (5 episodes)
1999

Law & Order: Special Victims Unit
Ben Nicholson · (1 episode)
1999

Law & Order: Special Victims Unit
Burton Lowe · (2 episodes)
1999

This Is My Father
Kieran O'Day
1999

In Dreams
Paul Cooper
1999

Practical Magic
Gary Hallet
1998

Forbidden Territory: Stanley's Search for Livingstone
Henry Morton Stanley
1997

The Assignment
Annibal Ramirez / Carlos
1997

The View
Self · (3 episodes)
1997

Commandments
Seth Warner
1997

Michael Collins
Harry Roland
1996

Looking for Richard
Richmond
1996

Lumière & Company
(segment "John Boorman")
1995

Haunted
Prof. David Ash
1995

The Stars Fell on Henrietta
Don Day
1995

Out of Ireland
Maurice Woulfe (voice)
1995

Legends of the Fall
Alfred Ludlow
1994

Mary Shelley's Frankenstein
Cap. Robert Walton
1994

Out of Ireland: The Story of Irish Emigration to America
Maurice Woulfe (voice)
1994

Blink
Detective John Hallstrom
1993

Benny & Joon
Benjamin 'Benny' Pearl
1993

A Private Matter
Bob Finkbine
1992

The Playboys
Tom Casey
1992

At Play in the Fields of the Lord
Martin Quarrier
1991

Lies of the Twins
James McEwan / Jonathan McEwan
1991

Avalon
Jules Kaye
1990

The Handmaid's Tale
Nick
1990

The Lemon Sisters
Frankie McGuinness
1989

Perfect Witness
Sam Paxton
1989

Crusoe
Crusoe
1988

Stakeout
Richard "Stick" Montgomery
1987

The Mission
Felipe Mendoza
1986

An Early Frost
Michael Pierson
1985

Desperately Seeking Susan
Dez
1985

Reckless
Johnny Rourke
1984
The Well of Saint Nobody
Cry from the Sea
Father MacGabbhan

Butterfly in the Typewriter
Barnet Rosset

LIVE with Kelly and Mark
Self - Guest · (1 episode)
1988

All My Sons
Chris Keller
1987
Ages of the Moon

Baseball
(voice) · (2 episodes)
1994

The Late Late Show
Self · (1 episode)
1962

Hallmark Hall of Fame
Tom Guthrie · (1 episode)
1951