Scott McCloud had an eyepatch; when he appeared as Space Angel, he would lower the dark-tinted visor on his helmet to conceal his identity.
Another memorable sequence occurred with the heroes involved in a best two-of-three gladiator battle, using future visions of Roman combat.
After the Space Angel and his crew had discovered the villains' plans or forces, he would call in reinforcements made up of one or more squadrons of the ISF.
The main antagonists in the show were the Anthenians, who were modelled on a combination of Ancient Rome and Sparta; their home planet is shown in the episode involving the gladiatorial games.
Another antagonist is Zorra, the Evil Queen of Space, who resembled Nefertiti, and her henchmen, "the General" and "the Major", who all spoke with Central European accents.
Predating the Star Trek episode "Balance of Terror", their claim to fame is an invisible spaceship they use to disrupt interstellar trade.