Terry O'Quinn has been acting since 1980! His birth name was Terrance Quinn, however he changed his surname to O'Quinn, since there was already another registered actor with his name.
He had portrayed many roles throughout his career, but is best known for playing John Locke on ABC's Lost.
O'Quinn is also well known for playing the title role in The Stepfather and Stepfather II, and Peter Watts in Millennium. Additionally, Terry has made appearances on many shows, including The X-Files, Harsh Realm, Roswell, Alias, The West Wing, JAG, NCIS, Hawaii Five-0, and Falling Skies.
He will be starring in ABC's new series 666 Park Avenue.