Kamen Rider - Season 24 Episode 21 Yggdrasill's Secret
The Helheim Forest will soon destroy the Earth if no one acts on it. Kouta informs Mitsuzane about this fact and says they must do something, but Mitsuzane is hesitant as he already knows the truth. Meanwhile, Kaito examines a photograph taken from within the Helheim Forest and believes he sees a human figure, then goes into the forest to investigate.
- Genre: Action & Adventure, Sci-Fi & Fantasy, Drama
- Studio: tv asahi, TBS, NET
- Keyword: artificial intelligence (a.i.), cyborg, martial arts, monster, hero, secret organization, villain, biker, superhero, tribe, conspiracy, swordsman, memory loss, impostor, based on manga, motorcycle, super power, masked superhero, supervillain, mysterious death, masked supervillain, death of hero, superhero teamup, mysterious disappearance, henshin heroes, friends to enemies, tokusatsu, evil dad
- Cast: Ryutaro Imai
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