Question: What was the nationality of John Wayne's co-star in "Big Jim McLain"?

Context articles: Big Jim McLain
James Arness
Kevin McLain
Mardock Mission
KLXR
Dark Command
James Fisk (financier)
New Frontier (film)
Big Jim (toy line)
Batjac Productions

Big Jim McLain is a 1952 Film Noir political thriller film starring John Wayne and James Arness as HUAC investigators hunting down communists in the post-war Hawaii organized labor scene.
 Edward Ludwig directed.
James Arness (May 26, 1923 – June 3, 2011) was an American actor, best known for portraying Marshal Matt Dillon for 20 years in the television series "Gunsmoke".
 Arness has the distinction of having played the role of Dillon in five separate decades: 1955 to 1975 in the weekly series, then in "" (1987) and four more made-for-television "Gunsmoke" films in the 1990s.
 In Europe, Arness reached cult status for his role as Zeb Macahan in the western series "How the West Was Won".
 He was the older brother of actor Peter Graves (1926–2010).
Kevin Wayne McLain (born September 15, 1954 in Tulsa, Oklahoma) is a former American football linebacker in the National Football League.
 He was a 1st round selection (26th overall pick) in the 1976 NFL Draft out of Colorado State University.
 McLain played for the Los Angeles Rams from 1976–1979.
Mardock Mission was a historic meetinghouse built in 1898 in Mardock, Oklahoma.
 The mission was listed in the National Register of Historic Places in 1983 for its significance as the only remaining building associated with the Big Jim Band of Absentee Shawnee Indians, the Quaker Missionaries, and a pre-World War I socialist movement.
 The Absentee Shawnee were so named because in 1845 they had left the rest of the tribe in Kansas and settled along the Canadian River in Indian Territory.
 Big Jim, (Wapameepto), grandson of Tecumseh, was the chief of the Kispicotha, better known as the Absentee Shawnee.
 The group numbered 454 in 1904.
KLXR (1230 AM, "Radio 1230") is an adult standards formatted radio station based in Redding, California.
 It features programing from Dial Global's America's Best Music format.
 The station owner is Michael R. Quinn, who used to own KCNR (1460 AM).
 The station is heard primarily in Shasta County only.
 The transmitter latitude is 40.553889 and longitude is -122.381389.
 Morning Show: Jimbo and Sue in the Morning.
 Featuring Jim Albertson and Sue McLain.
 Jim Albertson has been in broadcasting for 56 years, Sue McLain has been in broadcasting for 26 years.
Dark Command is a 1940 Western film starring Claire Trevor, John Wayne and Walter Pidgeon loosely based on Quantrill's Raiders during the American Civil War.
 Directed by Raoul Walsh from the novel by W.R. Burnett, "Dark Command" is the only film in which western icons John Wayne and Roy Rogers appear together, and was the only film Wayne and Raoul Walsh made together since Walsh discovered Wayne working as a prop mover, renamed him, and gave him his first leading role in the widescreen western "The Big Trail" a decade before.
James Fisk, Jr. (April 1, 1835 – January 7, 1872) – known variously as "Big Jim", "Diamond Jim", and "Jubilee Jim" – was an American stockbroker and corporate executive who has been referred to as one of the "robber barons" of the Gilded Age.
 Though Fisk was admired by the working class of New York and the Erie Railroad, he achieved much ill-fame for his role in Black Friday in 1869, where he and his partner Jay Gould befriended the unsuspecting President Ulysses S. Grant in an attempt to use the President's good name in a scheme to corner the gold market in New York City.
 Several years later Fisk was murdered by a disgruntled business associate.
New Frontier is a 1939 American Western film starring John Wayne, Ray "Crash" Corrigan, Raymond Hatton, and Jennifer Jones.
 This was the last of eight Three Mesquiteers Western B-movies with Wayne (there were fifty-one altogether).
 A restored 35 mm copy of the film exists and was screened at the Museum of Modern Art in New York City as part of a 2007 John Wayne centennial retrospective, which included "The Big Trail", "The Searchers", and "True Grit".
 The leading lady is Jennifer Jones billed as Phylis Isley.
 The director was George Sherman.
Big Jim was a popular line of action figure toys produced from 1972 through 1986 by Mattel for the North American and European markets.
 In Latin America he was renamed Kid Acero, and for a short period of time, Mark Strong in Europe.
 Originally inspired by G.I. Joe, the Big Jim line was smaller in size (closer to 10 inches in height compared to Joe's 12) and each figure included a push button in the back that made the character execute a karate chop action.
 The action figure's arms were made of a soft plastic/vinyl material and contained a mechanism that simulated the bulge of a biceps when the elbow was bent.
 Big Jim was less military-oriented than the G.I. Joe line, having more of a secret agent motif, but also had a large variety of outfits and situations available including sports, space exploration, martial arts, hunting, western, camping and even unusual choices such as fishing and photography.
Batjac Productions is an independent film production company founded by John Wayne in the early 1950s as a vehicle for Wayne to produce as well as star in movies.
 Its first release was "Big Jim McLain" with Warner Brothers in 1952, and its final film was also with Warner Brothers, "McQ", in 1974.
 After the actor’s death, his son, Michael Wayne managed and owned the company for over 30 years before he died in 2003, when his wife, Gretchen took over as owner and president.