Born in Harrah, he served in World War II, where he was twice injured in combat, and briefly was a prizefighter before eventually drifting into acting. Hollywood came knocking after movie agents noticed photos of Robertson, who had been stationed after the war at San Luis Obispo, Calif., in the storefront window of a Los Angeles photography store.
Tall, strikingly handsome and with a resemblance to Clark Gable, Robertson seemed a natural for movies.
He eventually made more than 60 films, mostly in 1950s-era B westerns. His biggest success came with TV's Tales of Wells Fargo, in which he played Wells Fargo agent Jim Hardie, from 1957 to '62. Other TV roles included Iron Horse, Dynasty and J.J. Starbuck. In the 1960s, he joined Ronald Reagan, Robert Taylor and others as among the narrators of TVs Death Valley Days.
Robertson's prominence in Westerns earned him induction in the Great Western Performers and the Cowboy Hall of Fame.
In retirement, Robertson and his wife, Susan, lived on his Haymaker Farms ranch near Yukon.
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