Prince's Ghost? (プリンスの幽霊？ Purinsu no Yūrei?) is the twenty-fifth episode of Choudenshi Bioman. This is the beginning of a two-part story furthering the story regarding the truth of Doctor Man's son, introducing Koichi Nakamura, a boy searching for his family who has a greater connection to the battle between Bioman and Gear. In the Philippine Dub the title of the episode changed to "The Return of the Black Prince".