Ultra Boy is a member of the Legion of Super-Heroes.
Jo Nah first appeared as a competitor at the Intergalactic Games on Olympic 12. When the Fatal Five attacked the games, Jo, along with Kem of Bismoll, helped the Legion defeat them, calling out the names of four of his various ultra-powers as he activated them ("Super strength!" "Invulnerability!" "Super-speed!" "Freezing breath!"). Phantom Girl complimented his skills and thought to herself that he was cute. Jo Nah appeared later as a full Legionnaire and offered his services to help the Legion stop the Sun-Eater.
- This version of the character is exclusive to the continuity of the television series Legion of Super-Heroes (TV Series) and is an adaptation of Jo Nah/Ultra-Boy. The original character was created by Jerry Siegel and Curt Swan and first appeared in Superboy #98.
- Ultra Boy was voiced by James Arnold Taylor.
- 5 Appearances of Jo Nah (Legion of Super-Heroes TV Series)
- 5 Images featuring Jo Nah (Legion of Super-Heroes TV Series)
- Quotations by or about Jo Nah (Legion of Super-Heroes TV Series)
- Character Gallery: Jo Nah (Legion of Super-Heroes TV Series)
Legion of Super-Heroes member