Byron Foulger's last feature film, released just after his death from a heart condition.
This film became Dan Blocker's final role (besides his long-running role as "Hoss Cartwright" on Bonanza) before his death from complications from gall bladder surgery in May 1972.
Dan Blocker (Charley) and Jack Elam (Kittrick) appeared on Bonanza (1959).
Mickey Rooney and Jim Backus also starred together in It's a Mad Mad Mad Mad World (1963) and Pete's Dragon (1977).