|This article is about a/an episode in Hikari Sentai Maskman.|
The Black Shadow of the Misty Valley (霧の谷の黒い影 Kiri no Tani no Kuroi Kage) is the twenty-first episode of Hikari Sentai Maskman. It is the second of a three-part story, introducing second mecha Galaxy Robo.
With Great Five buried underground, Sugata decides to investigate a rival mecha that has gained infamy for killing its creator.
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- Takeru (タケル): Ryousuke Kaizu (海津亮介 Kaidu Ryōsuke)
- Kenta (ケンタ): Koichi Kusakari (草刈滉一 Kusakari Kōichi)
- Akira (アキラ): Issei Hirota (広田一成 Hirota Issei)
- Haruka (ハルカ): Yuki Nagata (永田由紀 Nagata Yuki)
- Momoko (モモコ): Kanako Maeda (前田夏菜子 Maeda Kanako)
- Commander Sanjuurou Sugata (姿 三十郎 Sugata Sanjyurō): Hayato Tani (谷 隼人 Tani Hayato)
- Azuma: Reiko Shichida (七田玲子 Shichida Reiko)
- Earth Emperor Zeba (地帝王ゼーバ Chiteiō Zēba, Voice): Seizō Katō (加藤 精三 Katō Seizō)
- Earth Imperial Commander Baraba (地帝司令バラバ Chitei Shirei Baraba): Keijiro Shiga (志賀圭二郎 Shiga Keijirō)
- Earth Imperial Ninja Oyobu (地帝忍オヨブー Chiteinin Oyobū): Yoshinori Okamoto (岡本美登 oshinori Okamoto)
- Earth Imperial Prince Igam (地帝王子イガム Chiteiōshi Igamu): Mina Asami (浅見 美那 Asami Mina)
- Earth Imperial Ninja Fumin (地帝忍フーミン Chiteinin Fūmin): Kaori Kubota (久保田香織 Kubota Kaori)
- Earth Curiosities Beast Anagmas (地奇地奇獣アナグマス Chiki Chikijū Anagumasu, Voice): Takuzou Kamiyama (神山 卓三 Kamiyama Takuzō)
- Doctor Akira Yamagata (山形 晃 博士 Yamagata Akira-hakase): Tomoki Kenmochi (剣持伴紀 Kenmochi Tomoki)
- Yumi Yamagata (山形由美 Yamagata Yumi): Mamiko Tayama (田山真美子 Tayama Mamiko)
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- Galaxy Robo was introduced in this episode.
- In this episode, Commander Sugata reveals to Takeru and the group about his late best friend, Dr. Yamagata who is the creator of both Great Five and the Galaxy Robo.
- Dr. Yamagata's daughter, Yumi appears in this episode who becomes growing distant towards Commander Sugata due to the accidental death of her father. But this soon changes when Sugata convinces her to use her father's creation the Galaxy Robo which she reluctantly agreed until he asks her about her visitation to her father's grave where she hears her father's voice.
- It also reveals that Dr. Yamagata's voice was recorded before he was blown in explosion on the Galaxy Robo's cockpit to death as Yumi and Commander Sugata realize Yamagata's dying wish.
- In the Philippine Dub, Dr. Yamagata and his daughter Yumi are voiced by unknown voice actors which it was not seen in the list of casts in their second Facebook account.
Hikari Sentai Maskman Volume 3 features episodes 21-30.