O'Quinn also appeared in the Canadian horror movie, Pin (1988) alongside British-born Canadian actor, David Hewlett. Starting in 1980, O'Quinn has appeared in various feature films such as Silver Bullet, Tombstone, Heaven's Gate, Young Guns, alongside Rutger Hauer in Blind Fury, and as Howard Hughes in The Rocketeer. He was roommates at CMU with actor Brad Slaight.

This musical featured five main characters: The Man (played by Jeff Daniels), The Boy (Harold Downs), The Woman (Ann O'Donnell), The Girl (Debbie Penwarden), and The Drunk (James Hilliker), plus a female and a male chorus. He wrote and directed the musical Orchestrina. He not only was an actor but also playwright/director. O'Quinn began acting in the 1970s during his time at Central Michigan University. His first movie role was in Heaven's Gate. He remained at Center Stage for some years and often appeared with the late Tana Hicken, most notably as Benedick to her Beatrice in Much Ado About Nothing. In the 1970s, he went to Baltimore to act in the Center Stage production of Tartuffe. He changed his surname from Quinn to O'Quinn as another registered actor already had the name Terrance Quinn. He attended Central Michigan University in Mount Pleasant, Michigan, and the University of Iowa in Iowa City. He is of Irish descent, and was raised Catholic. Marie, Michigan, one of 11 siblings, and grew up in nearby Newberry, Michigan. O'Quinn was born at War Memorial Hospital in Sault Ste. For his role in Lost, he won the Emmy Award for Outstanding Supporting Actor in a Drama Series. He has also hosted Mysteries of the Missing on The Science Channel. He played John Locke on the TV series Lost, the title role in The Stepfather and Stepfather II, and Peter Watts in Millennium, which ran for three seasons (1996–1999). Terrance Quinn (born July 15, 1952), known professionally as Terry O'Quinn, is an American actor.

Lost and Found by Quin