Once Upon a Time... Space stands out among its counterparts by shifting its focus from education to drama. While still offering educational snippets like exploring Saturn's rings, the series follows in the footsteps of Once Upon a Time... Man by reintroducing familiar characters in a futuristic setting. The narrative unfolds amidst a cosmic power struggle involving the Omega Confederation, Earth's affiliation; the militant Cassiopée republic led by the formidable General Le Teigneux; and a formidable supercomputer commanding an army of robots. Centered around Pierrot, son of Colonel Pierre and President Pierrette, and his companion Psi, the series delves into their thrilling escapades in this intergalactic saga.