Ghost Hunter 2018 (ゴーストハンター2018 Gōsuto Hantā Nisen-Jūhachi) is the thirteenth episode of Kamen Rider Zi-O. It is the first part of the Kamen Rider Ghost and Kamen Rider Decade tribute arcs. Thus, it features the return of Takeru Tenkuji, Shibuya Hachioji, Narita Kisarazu, and Tsukasa Kadoya, portrayed by Shun Nishime, Takuya Mizoguchi, Reo Kansyuji, and Masahiro Inoue respectively. It also features the only appearance of Zi-O GhostArmor as well as the debut of the Decade Ridewatch and the Neo Decadriver.
This episode is accompanied by the thirteenth episode of Kamen Rider Zi-O: Supplementary Plan web series, Ghostly Teacher.
Geiz was able to return home from Helheim successfully, only now he has a renewed determination to kill Sougo at any time, and anywhere! Another Rider suddenly appears in the city, to be striking people down and taking their souls away! Takeru Tenkuji and Narita of the Mysterious Phenomenon Institute set out to capture this Another Rider, but as soon as they reach the location, they see none other than... Kamen Rider Agito?!