In Kamen Rider Outsiders Ep. 4: Mad Time and Zein’s Identity, the mysterious Kamen Rider Zein is no other than Kamen Rider Den-O’s Yuto Sakurai (role reprised by Yuichi Nakamura)! What happened to the man who was once known as Kamen Rider Zeronos? But that’s not all, the Roidmude named Brain (role reprised by Shota Matsushima) was resurrected as a Humagear, and holds the key to the story as he watches the battle between Kamen Rider Zein and Bronze Drive (role reprised by Masakazu Morita) for some reason.
Also appearing in this episode are: Sakuya Tachibana/Kamen Rider Garren (role reprised by Kousei Amano), Horobi/Kamen Rider Horobi (role reprised by Syuya Sunagawa), Nico Saiba (role reprised by Reina Kurosaki), Ark/Kamen Rider Ark (role reprised by Show Hayami), Foundation X members Ecole (role reprised by Yamato Furuya) and Rando Joseph (role reprised by NJPW’s Hiromu Takahashi), and George Karizaki (role reprised by Noritaka Hamao).
Written by Daiki Nagahama with Yuya Takahashi (Kamen Rider Geats) serving as script supervisor, and directed by Takayuki Shibasaki (Kamen Rider Geats × Revice: Movie Battle Royale), Kamen Rider Outsiders ep.4 – Mad Time and Zein’s Identity is set to premiere this October, exclusively on the Toei Tokusatsu Fan Club.