Ep. 112: Tetsuro reaches Promethium and faces a critical decision regarding his cyborg transformation.
Aired on March 19, 1981

112
Upon arriving at Promethium, Tetsuro is granted twenty-four hours to decide on becoming a cyborg. During this period, he encounters a suicidal cyborg who reveals that Maetel is the daughter of Promethium. Additionally, his guide Mirai informs Tetsuro that he has been selected to serve as a vanguard soldier for the Mechanized Empire. These revelations complicate his choice, leading Tetsuro to eventually confront Maetel about the truths he has learned. The narrative focuses on his internal struggle and the external pressures exerted by the new information provided by the cyborg and Mirai, setting the stage for his final resolution.
Episodes
- Ep. 108 · Main and Sab Plan to Escape Using Maetel and Tetsuro as Scapegoats
- Ep. 109 · The 999 encounters a temporal duplicate during a warp jump while heading toward a drifting planet.
- Ep. 110 · Maetel's Journey Part Two: The Phantom Planet Encounter
- Ep. 111 · Tetsuro encounters Masai, an animator seeking a cyborg body, who steals his pass on the Bat Planet.
- Ep. 112 · Tetsuro reaches Promethium and faces a critical decision regarding his cyborg transformation.
- Ep. 113 · Maetel rescues the 999 and reunites with Tetsuro to defeat Promethium