
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…
Hawaii Five-0
2010

Unsung Hero
as Grandpa James

Getting LOST
as Self

Christmas Sail
as Dennis

New Life
as Dr. Philip Sumrall

Taken from Me: The Tiffany Rubin Story
as Mark Miller

Old School
as Goldberg (uncredited)

Phenomenon II

The Locket
as Casey Keddington

Hometown Legend
as Buster Schuler

Town Diary

The Walking Dead: The Ones Who Live
as Major General Johnathan Beale · 3 ep.

LOST: Circle
as John Locke · 80 ep.

PIECES OF HER
as Martin Queller · 6 ep.

Resident Alien
as Peter Bach (voice) · 1 ep.

Ultra City Smiths
as Captain Krieger (voice) · 6 ep.

FBI: Most Wanted
as Byron LaCroix · 9 ep.

Emergence
as Richard Kindred · 5 ep.

Perpetual Grace LTD
as Wesley Walker · 10 ep.

Castle Rock
as Dale Lacy · 10 ep.

The Blacklist: Redemption
as Howard Hargrave · 7 ep.