Richard Boone, Rick Lenz, and Harry Morgan would appear together again in John Wayne's final film, The Shootist (1976).
Despite good ratings, the series was canceled after two seasons, following disagreements between Richard Boone and Universal.
In the fall of 1972, NBC moved its successful Wednesday night Mystery Movie series consisting of "Columbo," "McCloud," and "McMillan and Wife" to Sunday nights and added a fourth show, "Hec Ramsey," while turning the original slot over to three new mysteries ("Banacek," "Madigan," and "Cool Million"). "Hec Ramsey" was a product of Jack Webb's then prolific production company. The series, which ran for two seasons (a total of ten 90 minute to 2 hour episodes) was superficially a Western, but it was set in the waning days of the Wild West when science was beginning to play a more significant role in crime solving than gunplay.
It was mentioned in one episode of Hec Ramsey that he was a bounty hunter working out of San Francisco. (Richard Boone played such a character - "Paladin" - on "Have Gun Will Travel").
Set in Oklahoma in 1901, this was while Oklahoma was still a territory, with Oklahoma not achieving statehood until November 16, 1907 (46th state).