Episode quality varies considerably, based on the writers

As I went through the series, I noticed a number of things, one of which is that while the show was excellent as a whole, especially compared to any other Filmation series, the individual quality of the episodes varied considerably.

The best writers appeared to have been the pair of Ron Schultz & Sam Schultz. They penned at least two episodes, and both were among the strongest in the series. In fact, "Turnabout," in which Zorro faces a kind of anti-Zorro, another caballero from Spain, who actually fights him to a draw, is probably the series best episode as a whole. The Schultz episodes were quite unpredictable and exciting. In another one of their episodes, Ramon frames Zorro -- a clever ploy.

Robby London comes in at a close second-best among Zorro writers. He penned the series' final episode, which really felt like it was a finale (something that few animated series of the time ever received): the sister of the king of Spain comes to California incognito, initially thinking Zorro a bandit, but over time, realizes that Zorro is a hero and Ramon corrupt; she orders Zorro freed. If this sounds very much like the role of King Richard the Lionheart in the Robin Hood movies, I'm sure that's deliberate. As I said, it's a great final show. Robby London's other episodes were quite strong too.

Unfortunately, Arthur Browne Jr. seems to have written most of the episodes, and his are the weakest scripts. They have their moments, and some are definitely better than others, but all in all, the other authors did a better scripting job.