Season
- Season 1 2018-09-02
Episode
- Episode 1: Episode 1.5: Mystery of Naming
- Episode 2: Episode 2.5: Rules of the World
- Episode 3: Episode 3.5: Regal Spoilers
- Episode 4: Episode 4.5: A Confession of A Legend
- Episode 5: Episode 5.5: Sougo Tokiwa and the Mysterious Phone
- Episode 6: Episode 6.5: The Secret of Fourze 555
- Episode 7: Episode 7.5: Who is The Worst Black?
- Episode 8: Episode 8.5: The Terrifying Time Paradox!
- Episode 9: Episode 9.5: The King, God, and the Adult
- Episode 10: Episode 10.5: Mouri vs. Shimoyama
- Episode 11: Episode 11.5: Mysteries of 95DO!
- Episode 12: Episode 12.5: Interview with Future People
- Episode 13: Episode 13.5: Ghostly Teacher
- Episode 14: Episode 14.5: Pink Devil
- Episode 15: Episode 15.5: Supplementary Plan Forever (Part I)
- Episode 16: Episode 16.5: Supplementary Plan Forever (Part II)
Kamen Rider Zi-O: Supplementary Plan Season 1 Episode 7.5: Who is The Worst Black?
A web-exclusive series released on Toei Tokusatsu Fan Club. It accompanies the airing of the main series' episode the day after it.
