Gerald Stuart O'Loughlin Jr. (December 23, 1921 – July 31, 2015) was an American television, stage, and film actor and director who was primarily known for playing tough-talking and rough-looking characters.

After a stint with the United States Marine Corps, O'Loughlin used his GI Bill of Rights benefits to train at the Neighborhood Playhouse School of the Theatre in New York City.

This is one of the more grueling and compelling episodes of this western, featuring a strong ensemble cast alongside James Arness, displaying the relentless Marshal Matt Dillon, and aided by the ever-jawin' Festus, Ken Curtis.

He played Adam Beale Chief of the Hijack Containment Unit in Quincy Season 3 Episode 7 who works to take down terrorists hi-jacking a plane with a fatal virus on board.

O'Loughlin played the tough but sympathetic central figure of a group of prison inmates who take Hawaii Five-O chief Steve McGarrett (Jack Lord) hostage.

In 1978, he appeared in the pilot episode of The Eddie Capra Mysteries, and had roles in TV miniseries such as Wheels (1978), Women in White (1979), Roots: The Next Generations (1979) and Blind Ambition (1979).

The highlight of O'Loughlin's stage career was a national tour of A Streetcar Named Desire as Stanley Kowalski, opposite Tallulah Bankhead as Blanche DuBois.

[5] O'Loughlin's movie credits include Ensign Pulver, In Cold Blood, Ice Station Zebra, The Valachi Papers and Twilight's Last Gleaming.