**Gerald S. O'Loughlin (1921-2015)** was an American actor with a prolific career in film and television. Known for his imposing presence and rugged features, O'Loughlin established himself as a reliable character actor.

He was frequently cast as authoritative and often gruff figures, such as law enforcement officers, military personnel, or, occasionally, criminals. His most significant film appearances include Detective Harold Nye in *In Cold Blood* (1967), the submarine captain in *Ice Station Zebra* (1968), and the gangster Frank Gannon in *The Valachi Papers* (1972).

His style was characterized by a direct and intense acting approach, making him ideal for complex characters with strong dramatic impact.