This is the only serial in which Zorro's character has been presented authentically; often said to be a prequel to Zorro Rides Again (1937) because the main character of that serial was the original Zorro's descendant, it is, in fact, a completely original story featuring the actual Zorro character.
The scene where Zorro falls off a stagecoach then climbs up that back was later homaged by Indiana Jones with a truck in Raiders of the Lost Ark (1981).
When stuntman Yakima Cannutt jumps from his horse onto the lead horse of a stagecoach he did a backward summersault due to one of the horses catching his leg causing him to be flipped over.
The appearance of Benito Juarez in Chapters 1-2 & 12 presents us with somewhat of an anachronism. Although Juarez was alive at the time this serial was set--1824--he would have been only 18 years old at the time. The inclusion of Juarez in the story is most likely due to the release of the highly successful and popular Juarez (1939) earlier that year; which starred Paul Muni in the title role.
There is a total of 15 in Zorro's Fighting Legion group.