The 57th of Republic's 66 serials is filled with stock footage from some of that company's previous "Zorro" serials, primarily 1944's "Zorro's Black Whip", so a lot of the footage finds Ken Curtis wearing the same costume as Linda Stirling and (mostly) her double Babe DeFreest wore in that serial. Disney now owned the rights to the Zorro character, but Republic wasn't about to let all that footage go to waste when all they had to do was create a character called Don Daredevil. Those who express surprise at finding TV's "Festus" as the lead in a serial evidently are looking at the career of Ken Curtis from the back end rather than from the beginning aspect of his career. The serial has political boss Douglas Stratton finding that an old Spanish Land Grant made to Ricardo Moreno and later sold to Patrick Doyle to be a forgery, and he tries to cash in by having his men attempt to stake out mineral claims and homesteads on the ranches now part of the original grant.