Biography
Dierkes was born on February 10, 1905 in Cincinnati, Ohio. He attended Brown University and subsequently went to work as an economist for the United States Department of State. In 1941 he joined the Red Cross and served in the Britain duringWorld War II. There he met director John Huston who recommended that he try Hollywood after the war. Instead, Dierkes went to work for the U.S. Treasury Department which coincidentally sent him to Hollywood to function as technical advisor for the film To the Ends of the Earth (1948). Because of his appearance and very tall frame (6 feet, 6 inches), Dierkes enjoyed a long career as a character actor, often portraying villains or soldiers. In the 1953 film Shane, Dierkes portrays villain Morgan Ryker, who is the last man shot by the title character, Shane, in the final bar room shootout. One of his more memorable scenes is in the 1960 film, The Alamo. Dierkes portrays a Tennessean named Jocko, who is torn between leaving before the attack to care for his blind wife, or staying to support the Texans' cause. Understanding that if Jocko stays to fight she will likely be widowed, Jocko's wife coaxes him to stay and defend the fort, despite her disability. Dierkes died in 1975 of emphesyma and was survived by his wife Cynthia, two sons, and two daughters.
Filmography
Cast Credits
John Wayne's 'The Alamo'
Character: Jocko Robertson
MOVIE • 1992

Creepy Classics
Character: Roderick Craven - (archive footage)
MOVIE • 1987

Rage
Character: Bill Parker
MOVIE • 1972

The Omega Man
Character: Family Member
MOVIE • 1971

Johnny Cool
Character: Cripple
MOVIE • 1963

The Haunted Palace
Character: Benjamin West / Jacob West
MOVIE • 1963

X: The Man with the X-Ray Eyes
Character: Preacher (uncredited)
MOVIE • 1963

The Raven
Character: Roderick Craven
MOVIE • 1963

Convicts 4
Character: Cell Block Guard (uncredited)
MOVIE • 1962

The Premature Burial
Character: Sweeny
MOVIE • 1962

The Comancheros
Character: Ranger Bill Larsen (uncredited)
MOVIE • 1961

One-Eyed Jacks
Character: Chet
MOVIE • 1961

The Alamo
Character: Jocko Robertson
MOVIE • 1960

The Aquanauts
Character: Inspector Crail
TV • 1960

The Slowest Gun in the West
Character: 'Wild Bill' Monks
MOVIE • 1960

The Oregon Trail
Character: Gabe Hastings
MOVIE • 1959

The Hanging Tree
Character: Society Red
MOVIE • 1959

Rawhide
Character: Private
TV • 1959

Rawhide
Character: Martinson
TV • 1959

The Buccaneer
Character: Deacon
MOVIE • 1958