The Galman Empire is destroyed but the planet Galmania is not, by a chance collision of galaxies. The Bolar Federation worlds including Planet Bolar are destroyed. The Yamato, back under the command of Captain Okita, encounters the planet Denguil too late to save its humanoid civilization from being flooded by the water planet Aquarius. The surviving Denguil, a warrior race who believe only the strong should survive, plan to use Aquarius to flood Earth and destroy humanity, in order to create a new home for their race.
富山敬
as Susumu Kodai
麻上洋子
as Yuki Mori
ささきいさお
as Daisuke Shima
仲村秀生
as Daisuke Shima
安原義人
as Kenjiro Ota
林一夫
as Yasuo Nanbu
緒方賢一
as Analyzer
古谷徹
as Tasuke Tokugawa
寺島幹夫
as Sho Yamazaki
神谷明
as Shiro Kato
津嘉山正種
as Lugal II
伊倉一恵
as Dingir Boy
