Laredo is a American Western television series that aired on NBC to April 7, 1967. Laredo celebrities Neville Brand, William Smith, Peter Brown, and Philip Carey as Texas Rangers. It's put on the border around Laredo, Texas. Universal Television created This system. The pilot episode of Laredo aired on NBC's The Virginian under the title,"We've Lost a Train". It was released theatrically in 1969 under the title back track. Three episodes from the first season of the series were edited in to the 1968 feature film Three Guns for Texas.