An alternate version of Ultraman Cosmos 2: The Blue Planet, which was created due to the arrest of the film's star, Taiyo Sugiura. New scenes were filmed that are primarily set in the past. Musashi Haruno, now a middle school student, continues to pursue his dream to become an astronaut, which is also a promise he made with Cosmos. However, he is on the verge of despair because space development gets canceled due to a rocket accident. A mysterious girl named Shau appears in front of Musashi. She invites him to a mysterious parallel space and shows him a vision of what will happen to him 10 years from now. He witnessed a crisis of Earth's destruction caused by Sandros, the worst destroyer in the universe!
as Musashi Haruno
as Mari Kawase
as Alien Gyashi Jin
as Alien Gyashi Shau
as Kido
as Hyuga
as Kanou
as Makabe
as Tsutomu Sasaki
as Shoji
as Rita
as Boys and Girls of Blue Area 1
as Boys and Girls of Blue Area 2
as Boys and Girls of Blue Area 3
as Boys and Girls of Blue Area 4
as Boys and Girls of Blue Area 5
as Boys and Girls of Blue Area 6
as Boys and Girls of Blue Area 7
as Boys and Girls of Blue Area 8
as Boy from Kitakyushu
as Reporter
as Harumitsu Hiura
as Shinobu Mizuki
as Keisuke Fubuki
as Koji Doigaki
as Ayano Morimoto
as Kinozaki
as Akagi
as Hijikata
as Inugai
as Yujiro Haruno
as Michiko Haruno
as Ultraman Cosmos (voice)
as Ultraman Justice (voice)
as Shirubyi (voice)
as Sandros (voice)
as Female Operator (voice)
as Narration (voice)