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.
Scanlon
Charlie
Rydell
Ace
Indian
Dahoma
Jeb Bricker
Private
Martinson
Benjamin West / Jacob West
Morgan Ryker
Inspector Crail
Bursar
Ranger Bill Larsen (uncredited)
Farmer (uncredited)
Joe Bronson
Dr. Belvedere
Cross Creek Townsman (uncredited)
Roderick Craven
Society Red
Preacher (uncredited)
Ross
Deacon
McSween
Carson - Horgan Rider
Policeman (uncredited)
Cell Block Guard (uncredited)
'Wild Bill' Monks
Gruber
Jim Conklin - the Tall Soldier
Sweeny
Cripple
Arnie
Gabe Hastings
Texas Storekeeper (uncredited)
Family Member
Batley
Cpl. Fred Deane
Bosun (uncredited)
Jocko Robertson
Roderick Craven - (archive footage)
Ez
Chet
Swanson
Sheriff Daws
Dr. Chapman
Jocko Robertson
General Morris
Bill Sowers
Night Court Judge (uncredited)
Bartender
Jacob
Swede - the Cook (uncredited)
Police Sergeant
Freil
Cletus Ballard
Bill Parker