This is a very rare tv series, quality is watchable, but low quality. Check out the sample episodes to make sure you are happy before purchasing. Though it is low quality, this is the best source available. Like I said, this is a very rare and almost complete (missing 1 episode) series.
Trackdown is an American Western television series starring Robert Culp that aired on CBS between 1957 and 1959. The series was produced by Dick Powell's Four Star Television and filmed at the Desilu-Culver Studio. Trackdown was a spin-off of Powell's anthology series, Dick Powell's Zane Grey Theatre.
Trackdown stars Robert Culp as Texas Ranger Hoby Gilman. It is set in the 1870s after the American Civil War. In early episodes, stories focused on Gilman going to different Texas towns in pursuit of wanted fugitives. At midseason, the series became set in the town of Porter, Texas. Episodes touched on multiple Western themes and topics, so it was known as "the thinking man's Western".