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Acting
Terrance Quinn (born July 15, 1952), known professionally as Terry O'Quinn, is an American actor. He is best known for his Emmy Award-winning performance as John Locke on the TV series Lost (2004–2010). He had roles in films including The Stepfather (1987), The Rocketeer (1991), Heaven's Gate (1980), Silver Bullet (1985), Young Guns (1988), Blind Fury (1989), Tombstone (1993) and Primal Fear (1996). Other prominent television roles include Peter Watts in Millennium (1996–1999), FBI Asst. Director Kendall in Alias (2002–2004), Commander Joe White in Hawaii Five-0 (2011–2018), and Tom Tavner in Patriot (2015–2018).

Getting LOST
as Self

Unsung Hero
as Grandpa James

The Walking Dead: The Ones Who Live
as Major General Johnathan Beale

LOST: Circle
as John Locke

PIECES OF HER
as Martin Queller

Christmas Sail
as Dennis

Ultra City Smiths
as Captain Krieger (voice)

Resident Alien
as Peter Bach

FBI: Most Wanted
as Byron LaCroix

Emergence
as Richard Kindred

Perpetual Grace LTD
as Wesley Walker

Castle Rock
as Dale Lacy

Mysteries of the Missing
as Self - Host

The Blacklist: Redemption
as Howard Hargrave

New Life
as Dr. Philip Sumrall

Patriot
as Tom Tavner

Secrets and Lies
as John Warner

Gang Related
as Sam Chapel

Full Circle
as Jimmy Parerra

Ring of Fire
as Oliver Booth

666 Park Avenue
as Gavin Doran

Taken from Me: The Tiffany Rubin Story
as Mark Miller

Hawaii Five-0
as Joe White

Masters of Science Fiction

Lost
as John Locke

Phenomenon II

NCIS
as Will Ryan

Old School
as Goldberg (uncredited)

Jimmy Kimmel Live!
as Self

The Locket
as Casey Keddington

Town Diary

Hometown Legend
as Buster Schuler

First Monday

Alias
as Kendall

Law & Order: Criminal Intent
as Gordon Buchanan
Good Day Live
as Self

American Outlaws
as Rollin H. Parker

WW3
as Eric Farrell

Semper Fi
as Cliff's Father

Rated X
as J.R. Mitchell

Harsh Realm

Roswell
as Carl

The West Wing
as Nicholas Alexander

Murder in a Small Town
as Sidney Lassiter

The X-Files
as Michaud

Breast Men
as Hersch Lawyer

The View
as Self

My Stepson, My Lover
as Richard Cory

On the Edge of Innocence
as David Walker

Shadow Conspiracy
as Frank Ridell

Ghosts of Mississippi
as Judge Hilburn

Millennium
as Peter Watts

Primal Fear
as Yancy

JAG
as Admiral Thomas Boone

The Client
as Bert Halliwell

Ray Alexander: A Menu for Murder
as Frank Darnell

Shadow Warriors
as Dr. Connors

Earth 2
as Reilly

Lipstick Camera
as Raymond Miller

A Friend to Die For
as Ed Saxe