Banned in the Philippines: One of the more infamous examples in anime circles, and one that may well have led to its immortalization in the Philippines. The first time the show was broadcast there in the very late 1970s, President Ferdinand Marcos' government ordered the show taken off the air with four episodes to go, with the official reason for the removal being cited as concern from local Catholic parents' groups over the show's "brutal violence". These would be the four episodes, for the record, that capped off with the overthrow of a dictatorship.
Mazinger Z and Daimos were also affected, cutting off the airing of their finales. Urban legend, and a lot of genuine suspicion, holds that the ban was just as much a response to the show's focus on Boazan's totalitarianism, as the country was then under its own totalitarian dictatorship ever since Marcos declared martial law in 1972.
This isn't helped by the fact that the show was cut off a mere four episodes before the conclusion, where the Boazan Emperor is overthrown; thus deeming the concerns of Moral Guardians as convenience for the government to hide the real reason.
Many of those who protested against the regime a few years later in 1986, leading to its overthrow (in the wake of the assassination of Benigno Aquino Jr.), adopted Voltes V as a Movement Mascot and so the show became a symbol of resistance against the Marcos regime, as this art installation memorializes. The show proved popular enough to return years later.
The 1999 revival is notable for being hyped to death and back as the show's "second coming", complete with a movie compilation of the last four episodes... though it and Daimos had returned in the early 1990s after Marcos was gone.