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Acting
Jacques Joseph O'Mahoney, known professionally as Jock Mahoney, was an American actor and stuntman. He starred in two Western television series, The Range Rider and Yancy Derringer. He played Tarzan in two feature films and was associated in various capacities with several other Tarzan productions. He was sometimes credited as Jack O'Mahoney or Jock O'Mahoney. Jock entered the University of Iowa in Iowa City and excelled at swimming and diving, but dropped out to enlist in the United States Marine Corps when World War II began. He served as a pilot, flight instructor, and war correspondent. After his discharge from the Marine Corps, Mahoney moved to Los Angeles, and for a time was a horse breeder. However, he soon became a movie stuntman, doubling for Gregory Peck, Errol Flynn, and John Wayne. Most of Mahoney's films of the late 1940s and early 1950s were produced by Columbia Pictures. Like many Columbia contract players, Mahoney worked in the studio's two-reel comedies. Beginning in 1947, he starred with the Three Stooges in their films Out West, Squareheads of the Round Table (and its remake, Knutzy Knights), Fuelin' Around, and Punchy Cowpunchers. Beginning in 1950, Columbia management gave him starring roles in adventure serials. Mahoney contributed so much to this series that he was awarded featured billing and major supporting roles as well, first as villains and then as sympathetic characters. By 1952 Columbia was billing him as Jack Mahoney. Cowboy star Gene Autry, then working at Columbia, hired Mahoney to star in a television series. Autry's Flying A Productions filmed 79 half-hour episodes of the syndicated The Range Rider from 1951 to 1953. For the 1958 television season, he starred in the somewhat Western Yancy Derringer series for 34 episodes, which aired on CBS. Yancy Derringer was a gentleman adventurer living in New Orleans, Louisiana, after the American Civil War. He had a Pawnee Indian companion named Pahoo Katchewa ("Wolf Who Stands in Water"), who did not speak, played by X Brands. Pahoo had saved the life of Derringer, and thereafter was responsible for Derringer's life. In 1962, Mahoney became the 13th actor to portray Tarzan when he appeared in Tarzan Goes to India, shot on location in India. A year later, he again played the role in Tarzan's Three Challenges, shot in Thailand. Dysentery and dengue fever plagued Mahoney during the shoot in the Thai jungles, and he plummeted to 175 pounds. He needed a year and a half to regain his health. Owing to his health problems and the fact that producer Weintraub had decided to go for a "younger look" for the apeman, his contract was mutually dissolved. In the 1980s, Mahoney made guest appearances on the television series B. J. and the Bear and The Fall Guy. During the final years of his life, he was a popular guest at film conventions and autograph shows. Mahoney died of a second stroke at age 70, two days after being involved in an automobile accident in Bremerton, Washington. His ashes were scattered into the Pacific Ocean.

Tarzan: Lord of the Movies
as Tarzan (Archive Footage)
Salamat sa Alaala
as Self (archive footage)

Tarzan at the Movies, Part 2: The Many Faces of Tarzan
as Tarzan (archive footage)

The Master
as Mark Richards
The Making of the Stooges
as Self

Simon & Simon
as Oldtimer #1 in Saloon

The Fall Guy
as Wild Dan Wilde

When the West Was Fun: A Western Reunion
as Self

B. J. and the Bear

The Bad Bunch
as Sgt. Berry

Kung Fu
as Davidson

The Streets of San Francisco

Banacek
as Albert Bates

Emergency!
as Hoyt Herrold

Tarzan's Deadly Silence
as The Colonel

The Love Bug
as Driver

Hawaii Five-O
as Coley Bennett

Bandolero!
as Stoner

The Glory Stompers
as Smiley

Tarzan
as Hoby Wallington

Batman
as Leo

Runaway Girl
as Randy Minola

Moro Witch Doctor
as Jefferson Stark

Daniel Boone
as O'Connor

The Walls of Hell
as Lt. Jim Sorenson

California
as Don Michael O'Casey

Tarzan's Three Challenges
as Tarzan

Tarzan Goes to India
as Tarzan

Three Blondes In His Life
as Duke Wallace

Gunslinger
as Halsey Roland

Tarzan the Magnificent
as Coy Banton

Rawhide
as Captain Brian Donahoe

77 Sunset Strip
as Barry James

Yancy Derringer
as Yancy Derringer

Money, Women and Guns
as 'Silver' Ward Hogan

A Time to Love and a Time to Die
as Immerman

The Last of the Fast Guns
as Brad Ellison

Slim Carter
as Slim Carter (Hugh Mack)

Joe Dakota
as The Stranger

The Land Unknown
as Commander Harold 'Alan' Roberts

Battle Hymn
as Maj. Frank Moore

Showdown at Abilene
as Jim Trask

I've Lived Before
as John Bolan / Lt. Peter Stevens

Away All Boats

A Day of Fury
as Marshal Allan Burnett

The Millionaire
as Vance Ludlow

The Wonderful World of Disney
as Driver

Overland Pacific
as Ross Granger

Knutzy Knights
as Cedric the Blacksmith

Gunfighters of the Northwest
as Joe Ward

Letter to Loretta
as Andy Hagen

The Kid from Broken Gun
as Jack Mahoney

Junction City
as Jack Mahoney

The Rough, Tough West
as Big Jack Mahoney

Laramie Mountains
as Swift Eagle

The Hawk of Wild River
as Jack Mahoney

Smoky Canyon
as Jack Mahoney

Pecos River
as Jack Mahoney

The Lady and the Bandit
as Tavern Troublemaker

The Texas Rangers
as Duke Fisher