Transformation Tragedy
Sho discovers that his father is alive and attempts a daring rescue to save him and Mizuky. Balcus, knowing what Sho will do has set a trap to capture the Guyver.
Aired 21/05/1992EP 3 - Transformation Tragedy

1991
The Guyver: Bio-Booster Armor
Sho and his friend Tetsurou stumble upon an odd alien artifact while walking through the woods. Then, the alien artifact breaks free of its metallic bonds and enters Sho's body, turning him into the Guyver. With this new power, Sho must do battle with the evil Chronos corporation and their genetically enhanced Zoanoids, who seek to get the Guyver back into their labs. No one close to Sho is safe from Chronos. He must fight.
(Source: Anime News Network)