<P> In the 1930s, Stone came to Los Angeles, California, to launch his own screen career . He was featured in the "Tailspin Tommy" adventure serial for Monogram Pictures . In 1940, he appeared with Marjorie Reynolds, Tristram Coffin, and I. Stanford Jolley in the comedy espionage film Chasing Trouble . That same year, he co-starred with Roy Rogers in the film Colorado in the role of Rogers's brother - gone - wrong . </P> <P> Stone appeared uncredited in the 1939 film Blackwell's Island . Stone played Dr. Blake in the 1943 film Gung Ho! and a liberal - minded warden in Monogram Pictures' Prison Mutiny in 1943 . Signed by Universal Pictures in 1943, in the film Captive Wild Woman (1943), Jungle Woman (1943), Sherlock Holmes Faces Death (Captain Pat Vickery), (1944), he became a familiar face in its features and serials . In 1944, he portrayed a Ration Board representative in the Universal - produced public service film Prices Unlimited for the U.S. Office of Price Administration and the Office of War Information . One of his film roles was a radio columnist in the Gloria Jean - Kirby Grant musical I'll Remember April . He made such an impression in this film that Universal Studios gave him a starring role (and a similar characterization) in the 1945 serial The Master Key . The same year, he was featured in the Inner Sanctum murder mystery The Frozen Ghost . </P> <P> In 1955, one of CBS Radio's hit series, the Western Gunsmoke, was adapted for television and recast with experienced screen actors . Howard McNear, the radio Doc Adams, was replaced by Stone, who gave the role a harder edge consistent with his screen portrayals . He stayed with Gunsmoke through its entire television run, appearing in 604 episodes through 1975, often shown sparring in a friendly manner with co-stars Dennis Weaver and Ken Curtis, who played, respectively, Chester Goode and Festus Haggen . </P> <P> In March 1971, Stone had heart bypass surgery at UAB Hospital in Birmingham, Alabama . In June 1980, Stone died of a heart attack in La Jolla . He was survived by his second wife, the former Jane Garrison, a native of Hutchinson, Kansas, who died in 2002 . Stone had married, divorced, and remarried Garrison . Stone had a surviving daughter, Shirley Stone Gleason (born circa 1926) of Costa Mesa, California, from his first marriage of 12 years to Ellen Morrison, formerly of Delphos, Kansas, who died in 1937 . He was buried at the El Camino Memorial Park in Sorrento Valley, San Diego . </P>

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