Actor/stuntman Aldo Canti was a thief with strong ties to the Mafia. He was reportedly let out of jail just to appear in this film. In subsequent films of the "3 Supermen" series, Canti's role was taken over by Italian stuntman/actor Sal Borgese. Canti appeared in only one other film in the series, the Turkish co-production 3 Supermen contro il Padrino (1979).
The first of the "3 Supermen" film series.
Sal Borgese: Bazooka-toting henchman seen early in the film. Borghese would play the mute Superman role in all subsequent films in the "3 Supermen" series.