The Gamma world is finally explained in Episode 42 of Kamen Rider Ghost: Shocking! The secret of the Hermit!
Episode 42: Shocking! The secret of the Hermit!
Written by Keiichi Hasegawa
Directed by Kyohei Yamaguchi
Adel makes an appearance again and it is now Makoto who gives his all facing him. However, he is defeated and suffers major injuries.
Adel tries to connect to the Great Eye again and he is rejected.
“The key is Takeru Tenkuji.”
Adel’s anger now fully directed towards Takeru, he makes a third appearance in the human world and this time Alain faces him.